To be repairs advocate.
If your MacBook is from 2017, then it is an Intel machine. Intel machines can run Linux, you can just install it instead of MacOS or even dual boot it.
And if it is a MacBook, you can simply replace the battery. It is super straightforward to do so. You buy the new battery, you don't need to get it from Apple, and you need the oentalobe driver and the torx driver. Open up the back and replace it. Apple stores will even take the old battery off your hands.
You might not be able to upgrade storage or ram, but with a new battery and your linux, you could absolutely get more life out of your machine.
I just wish manufacturers would make a laptop with these that isn't obsessed with being thin and light.
I'd absolutely love one of these power efficient chips with a 100whr battery.
Given how much space they save with the on package ram, and how small SSDs are, you could feasibly have this with two m.2 slots, perhaps one 2280 and one 2230.
Put a bunch of ports and you're sorted. No need for the thing to anorexic. My workload is light, I just want ports and battery.