Digital and software freedom/rights advocate from Slovenia, Europe. Also a member of the Pirate party. You can find me on Mastodon: @JRepin@mstdn.io
Depends on the specific distro and their upgrades policies.
Usually with normal distributions you get an update to a new major version (e.g. from Plasma 6.0 to Plasma 6.1, or some versions can be skipped) when a new version of the distribution gets released, and in the mean time you only get bug fix releases (e.g. 6.0.x to 6.0.y). Sometimes some distributions also make special backports available to bring new major versions to same distro version.
With rolling release distributions (e.g. openSUSE Tumbleweed) you get new major releases in a few days after they are released.
So you need to check with Nobara how they handle this.
Yeah I am so glad I switched to GNU/Linux years ago, Have to keep supporting closed OSes at work with our software and with each release they are just getting worse and worse, while GNU/Linux just keeps getting better.