I have a new laptop (Thinkpad P14s) with Fedora 34 Workstation and Gnome 40.4.0. I’m finding microphone sounds very low (using gnome-sound-recorder or web based videoconf like Jitsi). I’ve set up volume to maximum in Control Center and alsamixer.
Any suggestion, please? Other than buying an external microphone
You could try cleaning the microphone(s), even if there’s no visible grime/dirt. Isopropyl alcohol + cotton swabs should do the job. I don’t have enough experience with Linux to suggest anything else : /.