Cant Join Friend’s World Due to Connection Issue That Persists Despite Troubleshooting

Purchased Minecraft through play store a few days ago. My friend and I were able to play during the first day but then we encountered connection issues as days passed. Currently we are completely unable to connect to each other’s worlds. We did all of the troubleshooting such as uninstalling, restarting cellphone/wifi, updating privacy settings, signing out of Microsoft account, and other things that we searched online. This issue of joining a friend’s world persists despite troubleshooting. Messages such as “We were Unable to connect you”, “unable to connect to world”, “