We used our USBC-NVME enclosure and an SSD based on the Phison PS5012-E12 controller connected to our TBT3-UDC3 dock alongside our MacBook Pro 16".
With two 4K 60Hz displays working, our Blackmagic test results averaged 890MBps read and write.
While we can’t guarantee the specific speeds you would see through your Samsung SSD, I hope that helps clarify some real world test results.
Thanks!
Mitchell