perfect, thank you
here is the final result of sudo fdisk /dev/nvme1n1
per Dolphin doesn't show one of my partitions under 'Devices' - #12 by eeeeeeeeee
thanks to @eeeeeeeeee
Device Start End Sectors Size Type
/dev/nvme1n1p1 2048 1026047 1024000 500M EFI System
/dev/nvme1n1p2 1026048 630169599 629143552 300G Linux root (x86-64)
/dev/nvme1n1p3 630169600 1469030399 838860800 400G Linux home
/dev/nvme1n1p4 1469030400 2098175999 629145600 300G Linux filesystem
/dev/nvme1n1p6 3756034048 3907028991 150994944 72G Linux swap
dolphin now shows the devices as it should
thank you everyone for all the help and pointers… learned a lot (more than i needed to 