I believe that after gaining amnesia in 2-1, Phoenix just starts to forget small tasks and simple things like chores. Because canonically the next case Phoenix has after the amnesia one is 3-2 with Ron DeLite. One thing I noticed during that case is that Phoenix cleans the toilet a lot, which could be seen as him being a germaphobe. Although, I want to believe that since it’s such a simple task, Phoenix doesn’t remember cleaning the toilet before, resulting in a very clean toilet. I also believe that he wouldn’t notice that he’s accidentally cleaned it like 5 times until someone actually calls him out on it.
The problem is that most of the people close to him would probably just brush over it, assuming he just likes things clean. Apollo and Athena are definitely some of those people. Since they are usually the ones cleaning the toilet in the future, they probably just assume that Phoenix either really likes cleanliness (which is definitely not apparent from the rest of the office) or he’s giving them busy work. Phoenix on the other hand doesn’t even remember asking them to clean it in the first place, but doesn’t want to back down his stance and admit his fault (if he remembers at least).
Maya is one of the only people who can call Phoenix out because she’s the only one who really knows about the amnesia. She’ll be like, “Nick, you already did that 3 times!” Or “Nick, stop making your employees clean that toilet, it’s gonna get bleach stains!”
Trucy can also call him out, but she does it in a very nonchalant manner, mainly being like, “Daddy, I think you already cleaned that before.” Or “Don’t worry Daddy! Polly and Athena already cleaned it an hour ago!” Basically she remarks it in a way that it would feel like idle chatter.
I feel like Phoenix would also do this with other tasks, but in the opposite way. Instead he’ll be planning to do something simple, but amnesia kicks in and he can’t remember a single thing in that moment. Which wouldn’t be a problem, but it would probably also consist of eating certain meals every once in a while. While Phoenix has the full intent to actually eat, it might just slip his mind and he may not remember until he’s nearly starving. This wouldn’t happen as often though, it would probably be most prominent during the 7yg and when he’s working on stressful cases.
Edgeworth on the other hand doesn’t really have a stance on the whole thing. Of course he loves a nice, clean toilet, but he also likes when Phoenix can remember to feed himself. Once he finally catches onto the cause of why Phoenix does all of it, he starts to call him out too. He would say it a little more bluntly than Trucy, so that Phoenix can catch on that he didn’t simply forget it. Although, that doesn’t stop Miles from banning Phoenix from cooking without supervision. Because if Phoenix walks away from it for a second, there’s a huge chance he may not remember to come back. But the 3 of them have a great time cooking together anyway, so Phoenix doesn’t mind.
TLDR: Phoenix Wright has amnesia with simple tasks. This causes him to either repeat certain tasks many times, or completely forget to do them altogether. Only few of his loved ones have the mind to call him out on it though.