Disable default SMS app on OnePlus

I'm trying to debranch my phone from OnePlus and Google as much as possible. In the last few days, I removed some packages and replaced them with FOSS & trusted companies' apps. I'm stuck though... I cannot find the default SMS packages and I don't know how to fix or make the new apps default apps. I mean, lock them in the system as the OEM/provider does. All I can find now from OnePlus are:

~: adb shell pm list packages | grep sms
package:com.simplemobiletools.smsmessenger
package:con.android.smspush
~: adb shell pm list packages | grep oneplus
package:com.oneplus.calculator
package:com.oneplus.opscout
package:com.oneplus.opshelf
package:com.oneplus.account
package:com.oneplus.wallpaper
package:com.oneplus.wallpaperresources
package:com.oneplus.brickmode
package:com.oneplus.deskclock
package:com.oneplus.setupwizard
package:com.oneplus.camera.service
package:com.oneplus.push
package:com.oneplus.faceunlock
package:com.oplus.framework.rro.oneplus
package:com.oneplus.canvasresources
package:com.oneplus.opwlb
package:android.autoinstalls.config.oneplus
package:net.oneplus.launcher