Depending on when XP went EOL, then yes if you build a program on Win11 then it would install successfully on XP. (More likely Win7, XP has been EOL for over 10 years.)

But the rule is if you build on the latest Windows, and install on the oldest "live" Windows, it should work (and if you install on EOL windows, it will probably work - "probably" getting less likely the longer it's been EOL).

Cheers,
Wol