@John-Madsen Yes, you can just download and install the new version. All your features of Music Maker 2021 will be unlocked in 2022. But new features like Beatbox Pro or Song Maker AI are paid add-ons and not included.
No. Music Maker is free, so you can upgrade to Music Maker 2022 Version, but some new features, like the new AI Song Maker, will not work, even having the MMM Premium 2021 Edition. You will have to upgrade to MMM Premium 2022 to get all of the new features. See the Comparison table on the Magix web site.
I suggest waiting, as 2022 itself will likely have many problems.