I use eSIMDB: Find and Compare Best Travel eSIMs for Your Trip as a starting point to identify esim options for the countries I'm visiting. If you drill down to a specific plan and display its details, you will find that for alot (not all) of plans, an internet breakout country is listed. Out of the no-name esim providers, I've used mobimatter a few times without issues.
Thanks for the tip for mobimatter.
For anyone joining / buying an eSim use referral code P7YF260172 for a cashback up to $5 on your purchase. I will also get a cashback reward similar to yours.