try this!

esphome/components/ebyte_lora/__init__.py

@@ -1,7 +1,7 @@
 import esphome.codegen as cg
 import esphome.config_validation as cv
 from esphome import pins
-from esphome.components import sensor, text_sensor, uart, pcf8574
+from esphome.components import sensor, text_sensor, uart
 
 from esphome.const import (
     DEVICE_CLASS_SIGNAL_STRENGTH,
@@ -23,7 +23,6 @@ CONF_EBYTE_LORA = "ebyte_lora"
 CONF_PIN_AUX = "pin_aux"
 CONF_PIN_M0 = "pin_m0"
 CONF_PIN_M1 = "pin_m1"
-CONF_PCF8574 = "pcf8574"
 CONF_LORA_MESSAGE = "lora_message"
 CONF_LORA_RSSI = "lora_rssi"
 CONFIG_SCHEMA = (
@@ -40,7 +39,6 @@ CONFIG_SCHEMA = (
             cv.Optional(CONF_LORA_MESSAGE): text_sensor.text_sensor_schema(
                 entity_category=ENTITY_CATEGORY_NONE,
             ),
-            cv.Optional(CONF_PCF8574): cv.use_id(pcf8574.PCF8574Component),
             # if you want to see the rssi
             cv.Optional(CONF_LORA_RSSI): sensor.sensor_schema(
                 device_class=DEVICE_CLASS_SIGNAL_STRENGTH,
@@ -71,11 +69,6 @@ async def to_code(config):
     if CONF_LORA_MESSAGE in config:
         sens = await text_sensor.new_text_sensor(config[CONF_LORA_MESSAGE])
         cg.add(var.set_message_sensor(sens))
-
-    if CONF_PCF8574 in config:
-        comp = await cg.get_variable(config[CONF_PCF8574])
-        cg.add(var.set_pcf8574(comp))
-
     if CONF_LORA_RSSI in config:
         sens = await sensor.new_sensor(config[CONF_LORA_RSSI])
         cg.add(var.set_rssi_sensor(sens))

esphome/components/ebyte_lora/ebyte_lora.cpp

@@ -166,10 +166,12 @@ void EbyteLoraComponent::loop() {
       this->rssi_sensor_->publish_state(data[3]);
     if (this->message_text_sensor_ != nullptr)
       this->message_text_sensor_->publish_state("Got something");
-    if (this->pcf8574_ != nullptr) {
-      ESP_LOGD(TAG, "pcf8574 PIN: %u ", data[1]);
-      ESP_LOGD(TAG, "pcf8574 VALUE: %u ", !data[2]);
-      this->pcf8574_->digital_write(data[1], !data[2]);
+
+    for (auto *sensor : this->sensors_) {
+      if (sensor->get_pin() == data[1]) {
+        ESP_LOGD(TAG, "Updating switch");
+        sensor->got_state_message(data[2]);
+      }
     }
   } else {
     ESP_LOGD(TAG, "WEIRD");

esphome/components/ebyte_lora/ebyte_lora.h

@@ -8,6 +8,7 @@
 #include "esphome/core/helpers.h"
 #include "esphome/components/uart/uart.h"
 #include "esphome/core/log.h"
+#include "switch/ebyte_lora_switch.h"
 
 namespace esphome {
 namespace ebyte_lora {
@@ -39,11 +40,13 @@ class EbyteLoraComponent : public PollingComponent, public uart::UARTDevice {
   void set_message_sensor(text_sensor::TextSensor *message_text_sensor) { message_text_sensor_ = message_text_sensor; }
   void set_rssi_sensor(sensor::Sensor *rssi_sensor) { rssi_sensor_ = rssi_sensor; }
   void set_pin_aux(GPIOPin *pin_aux) { pin_aux_ = pin_aux; }
+  void register_sensor(EbyteLoraSwitch *obj) { this->sensors_.push_back(obj); }
   void set_pin_m0(GPIOPin *pin_m0) { pin_m0_ = pin_m0; }
   void set_pin_m1(GPIOPin *pin_m1) { pin_m1_ = pin_m1; }
   void set_pcf8574(pcf8574::PCF8574Component *pcf8574) { pcf8574_ = pcf8574; }
 
  private:
+  std::vector<EbyteLoraSwitch *> sensors_;
   ModeType mode_ = MODE_INIT;
   // set WOR mode
   void set_mode_(ModeType mode);

esphome/components/ebyte_lora/switch/__init__.py

@@ -24,3 +24,4 @@ async def to_code(config):
     await cg.register_component(var, config)
     cg.add(var.set_parent(parent))
     cg.add(var.set_pin(config[PIN_TO_SEND]))
+    cg.add(parent.register_sensor(var))

esphome/components/ebyte_lora/switch/ebyte_lora_switch.cpp

@@ -3,12 +3,7 @@
 namespace esphome {
 namespace ebyte_lora {
 static const char *const TAG_SWITCH = "ebyte_lora_switch";
-
-void EbyteLoraSwitch::write_state(bool state) {
-  this->parent_->digital_write(this->pin_, state);
-  // finally set it
-  this->publish_state(state);
-}
+void EbyteLoraSwitch::write_state(bool state) { this->parent_->digital_write(this->pin_, state); }
 void EbyteLoraSwitch::dump_config() { LOG_SWITCH(TAG_SWITCH, "Ebyte Lora Switch", this); }
 }  // namespace ebyte_lora
 }  // namespace esphome

esphome/components/ebyte_lora/switch/ebyte_lora_switch.h

@@ -15,6 +15,11 @@ class EbyteLoraSwitch : public switch_::Switch, public Component {
   void dump_config() override;
   void set_parent(EbyteLoraComponent *parent) { parent_ = parent; }
   void set_pin(uint8_t pin) { pin_ = pin; }
+  uint8_t get_pin() { return pin_; }
+  void got_state_message(bool state) {
+    ESP_LOGD(TAG, "Got an update");
+    this->publish_state(state);
+  };
 
  protected:
   void write_state(bool state) override;