2G option is missing on "Mobile Data Options > Voice & Data" setting in iOS 16.2

If 3G or LTE option is selected on Mobile Data settings and iPhone is connected to Wi-Fi, my battery loses approximately 30% of capacity over a night. Draining of 3% or 4% of battery per hour in standby mode without any load is too much. iPhone is always connected to Wi-Fi and I have no issues with reception (3-4 of 4 cellular bars). This issue is still there in iOS 16.2.

As a workaround I used to select 2G option on "Mobile Data Options > Voice & Data" setting to keep my battery drain as it should be (1-2% per hour). But, unfortunately, right after update to iOS 16.2, 2G option is missing. Is it possible to somehow make it available again?