There are various different ROMs available for the FP4 apart from /e/, including multiple shipping with microG by default.
As @noodlejetski already said, LOS has just been released as well, which means a LineageOS for microG build will surely follow in the not too distant future.
But even if all of that wasn’t the case, you can absolutely install /e/ yourself. If you don’t like the wall of commands, just put them in a text file add the appropriate extension for your OS (.sh for Linux for example), make it executable and run them as a script.