The real solution was ---> Erase the drive of all partitions, then reinstall Garuda and just use the default partition option ---> Use Entire Drive. I swapped 2 flies at one with this cause I wanted a bigger system partition.
Great, now I don't need another Nvme drive.
Results.
Guru3d SSD benchmark results as comparison. Similar Nvme M.2 drives here, some PCI-E Gen4. The drive is behaving as it should. (CrystalDisk mark has the same tests and layout) My RND4k Q1T1 results ranged from 46 to 60 which is to be expected.