What systems are affected by a battery disconnect, can a memory saver help??

What is your question?

I will be starting some custom projects to my '18 Corolla and was wondering upon disconnecting the battery, will my Navi radio and or driver assist systems, or steering angle sensor be affected? I do not want to take it to the dealer for any resetting of the radio and driver-assist camera. Should I use a "memory saver" (the type that has a 9v battery connected to it)? Thanks for any input.

How long has your 2018 Toyota Corolla had this problem?

N/A