Already have this on PS4 but wanted to ask as a reference to other games.

So the servers for Mad Max had shut down back in October 2020 which made the achievement "up to the task" unobtainable since the task of collecting online scrap is no longer possible. How does GOG address this issue? Was the achievement "up to the task" removed?

There is no Achievement called "up to the task", so yes, should be removed.

Cool although that was the toughest achievement to get in Mad Max. Need to complete every single task.

I know that Up To The Task had been removed on the GOG server side and it's no longer necessary for getting 100%, but I noticed that it still shows up in my list as a locked achievement. Is this normal for everybody? I just wanted to confirm and make sure that I am not experiencing a bug on my account. If it were removed, I would expect it to not show up at all, instead of still being a locked achievement.

There is also scrap crew in-game achievement that seems to be unobtainable. Scrap crew feature (collect scrap while the game was not running) used WB servers.