Bluebellflora these are the results from that one:
MacBook-Air-401:~ myname$ find / -type d -name "*The Sims 4*" 2>/dev/null
/Library/Application Support/Electronic Arts/EA app/InstallData/The Sims 4
/System/Volumes/Data/Library/Application Support/Electronic Arts/EA app/InstallData/The Sims 4
/System/Volumes/Data/Users/myname/Desktop/Electronic Arts/The Sims 4
/System/Volumes/Data/Users/myname/Applications/The Sims 4 Packs
/System/Volumes/Data/Users/myname/Documents/Electronic Arts/The Sims 4
/System/Volumes/Data/Applications/EA Games/The Sims 4 Packs
/System/Volumes/Data/Applications/EA Games/The Sims 4.app
/Users/myname/Desktop/Electronic Arts/The Sims 4
/Users/myname/Applications/The Sims 4 Packs
/Users/myname/Documents/Electronic Arts/The Sims 4
/Applications/EA Games/The Sims 4 Packs
/Applications/EA Games/The Sims 4.app
MacBook-Air-401:~ myname$
Anything here look promising? Thanks for your help, btw :)