That depends on whether or not your carrier supports esim for Android. Mine does not so I have Spectrum for sim1 and US Cellular for esim. Everything works great
Exactly. You can select a primary sim and the other is extended sim. You can still receive phone calls on both lines and text on both lines no matter which sim is primary.
Many of our members had successful setups of eSIM's. We do recommend looking in to carrier website or reaching out to carrier support for instructions to setup your eSIM.
One UI Beta Team