As you can see you get a lot of responses but it is still not clear what you want to do. Like @agc_softwares said Google nearly never allows apps that send an sms directly instead of via you standard call and text app on your phone.
These blocks let you use the standard apps on your phone
https://kodular-community-uploads.s3.dualstack.eu-west-1.amazonaws.com/original/2X/2/259274ace25c99ae1b2f272153c393a0d8966ded.png
If you still want your app to sms directly you can not post it to Google Play.