immanuelsamc if your ringtone volume is lower than expected, try these steps:
CHECK AUDIO FORMAT: ensure it’s in MP3, AAC or WAV.
EDIT VOLUME: use an audio editing app to increase the volume.
CHECK VOLUME SETTINGS: ensure ringtone volume is set high in Settings > Sound & vibration.
REBOOT YOUR PHONE: restart to see if it resolves the issue.
UPDATE SOFTWARE: check for updates in Settings > System > System update.
i hope after applying this tips your issue get resolved 🙂