Dual eSIM restrictions

So I’m traveling to Europe this week and had planned to simply use a second eSIM (I’ve got the IPhone 15 which can do that) but have just found out that “locked” means you can’t even use a data only eSIM in another country. This is the stupidest thing I’ve heard in a while.

Why, when I’m under contract, paying my bill, and still using my xfinity SIM should I not be able to use a second for a week? Still paying off my phone, but once again I’m under contract with them, not leaving their service.

has anyone else here found a way around this? No way I’m paying for their roaming, it’s stupid costly, more than 10x the cost of a temporary data SIM.