no delete vbmeta.img from stock. then flash stock room on both slots . then after do usual steps to flash custom rom. but I just did that again and same issue. so I went into ricedroid recovery and did a format/wipe data then it worked. so who knows lol.So you deleted vbmeta.img from the custom ROM zip, then flash stock, flashed again without – w, and then installed the latest rice droid and network is fixed?
thank God I have another phone pixel 7 pro to fall back on. weird but I like the 6pro better.