Always reboot router after changes?

I’m a new user of the AX1800 router.

Thus, I’ve been reviewing the firmware web admin panel and making a few changes - mostly basic settings such as password, time zone and device names.

Also decided to switch to manual mode DNS setting to use Quad9 DNS servers.

Question: is it advisable/recommended to always reboot the router after making change(s) to settings?

No, it’s not needed.