library not in scope in class

I have some code which I am trying to split into modules, the original code which compiles is:

#include <LoRa.h>

void setup() {
  // put your setup code here, to run once:
    LoRa.setPins(18, 23, 26);

}

and putting it in a class works as well in the main file, but splitting it into a header and implementation file always fails to build: Compilation error: 'LoRa' was not declared in this scope

the code is as follows: main.ino

#include "test.h"


void setup() {
    // put your setup code here, to run once:
  

}

void loop() {
  // put your main code here, to run repeatedly:

}

test.h

#ifndef LORA_H
#define LORA_H
#include <LoRa.h>


class test {

    public:
  
        test();
};

#endif

test.cpp

#include <Arduino.h>
#include "test.h"


test::test() {

    LoRa.setPins(18, 23, 26);

}

I have rewrote this many times but it will just never build

Your test.h has the header guard for LoRa, and since your test.h gets included first, the LoRa.h file will be completely empty. (Since LORA_H was already defined, assuming it uses the LORA_H header guard).

Try using a different header guard define than LORA_H:

#ifndef TEST_H
#define TEST_H
#include <LoRa.h>