Wifi tab doesn't come out

It’s not clear to me if the problem is only a GUI one (tab doesn’t come out) or there is a wifi connectivity problem.

Have you reboot, by-the-way? In the first case it could be a graphical hitch due to recent updates.
In the second case, the Netrorking Support category is full of solutions for your chipset RTL8822CE:
https://forum.garudalinux.org/search?q=RTL8822CE%20status%3Asolved%20%23issues-assistance%3Awifi-ethernet-bt
Often these solutions will require the installation of the proprietary drivers rtw88-dkms-git from the Chaotic AUR (so you’ll need to use your mobile phone in tethering) like this one, which is clearly explained:

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