Here is the SMSSync alternative for HTTP forward webhook (only to forward SMS to HTTPS endpoint)

Take a look at this, if you're searching for a alternative:
https://github.com/bogkonstantin/android_income_sms_gateway_webhook

Can be found on F-Droid.

I'm not related to the project or anything, but my SMSSync didn't work well with the latest Android version (ofc.).