I'm Unable to Boot into Mac OS Partition, partition type FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
Based on klanomath's answer to the question OS volume shows as type 'FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF', it would appear you are missing a APFS type partition.

I believe you should enter the following commands while booted to Recovery Mode. See klanomath's answer for an explanation.

diskutil unmountdisk disk0
gpt remove -i 2 /dev/disk0
diskutil unmountdisk disk0
gpt add -i 2 -b 409640 -s 168232920 -t 7C3457EF-0000-11AA-AA11-00306543ECAC /dev/disk0