stays in sos all the time even in wifi

I’m fairly certain that is an issue with your service provider, not the device or iOS.

SOS means there is connectivity to a network, usually not the one you have. All the networks have agreed to allow anyone, regardless of carrier to call emergency services. The only time you’ll see SOS when you know for certain your carrier has service in that area is if there’s an issue with your account. If you owe money for example, you can still summon help in an emergency. Best of luck. Carrier issues are the worst, especially bad if it’s am MVNO.

You may need to contact your carrier for help -

If you see No Service, Searching, or SOS on your iPhone or iPad - Apple Support

SOS means that your iPhone has lost the normal connection to your cellular carrier's service, but emergency calls will still go through.

Contact your carrier so they can help get things working normally again.

Right. Having WiFi on will not affect the cellular signal-strength indicators, which is what "sos" is.

What happens if you enable WiFi calling?

Won't work in SOS Mode. Wi-Fi Calling....if the option is offered by the carrier.....depends on a normal working cellular connection.....which does not exist in SOS mode.