I am also using a US Mobile eSIM with AT&T, but I’ve never had the issues you are experiencing. If your APN settings don’t match mine (as seen in the screenshots below), I would recommend updating them.
I am also using a US Mobile eSIM with AT&T, but I’ve never had the issues you are experiencing. If your APN settings don’t match mine (as seen in the screenshots below), I would recommend updating them.