Instead of searching for a risky, non-existent "HappyMod IPA," consider these safer and more legitimate alternatives on iOS:
On your iPhone, open > General > VPN & Device Management . Trust your Apple ID developer profile. Download your desired modified .ipa file via Safari. happymod ipa free
When using tools like AltStore or Sideloadly, create a "burner" or secondary Apple ID specifically for signing apps. Instead of searching for a risky, non-existent "HappyMod