If you already have a 7101A and aren't going to use it in a PC or Mac that has a PCIe slot, then I guess Thunderbolt is the next most convenient way to use it. Just remember that you'll get less than max performance (3500 MB/s?) from an NVMe when connected by Thunderbolt (2800 MB/s).
The Highpoint Chassis seems like a more compact design compared to the OWC and Sonnet solutions. Does it have the height, width, and length to allow a 7101A? Actually yes, and there's an option to buy them together:
https://www.pcworld.com/article/331...a-thunderbolt-3-storage-enclosure-review.html
https://www.amazon.com/dp/B07CTH5PND
https://highpoint-tech.com/USA_new/series-rs6661a-nvme-overview.htm
On the low-end, if you don't have a 7101A and you want to connect multiple NVMe, then the OWC Express 4M2 is interesting. Each NVMe is only connected by PCIe 3.0 x1 (811 MB/s each) but you can RAID 0 them together to get the max Thunderbolt bandwidth (2800 MB/s).
Four easy-to-access NVMe M.2 SSD slots customizable for any workflow with up to 32TB of capacity and up to 2800MB/s performance. Includes a 1 year warranty.
eshop.macsales.com
RAID 0 also solves the problem of some NVMe's having unexpectedly low speeds (800 MB/s instead of 2500 MB/s) while connected by Thunderbolt. If you don't like RAID 0, 800 MB/s by itself is still pretty good. It's faster than SATA 6G and almost as fast as USB 10Gbps.