It would depend on where you live, I’m sure, Yocheved Rotenberg .
In Dearborn, MI, near where I live, I already know about Muslim-owned shops that are catering to same-sex weddings.
The population is largely third and even fourth generation Lebanese, though, extremely American, and usually pretty progressive as far as non-Muslims go.
In fact, Lebanese-American Muslims own lots of bars and clubs, to include strip clubs.
The Lebanese I know would probably rather walk on glass before turning business down. So while their imams might not approve, I can’t see a baker in Dearborn declining an expensive cake order.