Has Sequoia finally resolved the PCIE M.2 NVME mounting issues so many faced?

I think the issue being discussed here in an issue where softRAID can not recognize drives, and AppleRAid has some trouble.

Problems with plain Disk Utility are likely caused by something else.

Readers have reported that drives that rely on Promise Drivers may need those drivers, or slightly different version, installed manually, as the version included in MacOS is stale.

Be sure to check with the card vendor for direct guidance on what Drivers might be needed for Sequoia.

OWC says they think its fixed.

consider that you may have a different or more complex problem.

Apple does not Act on what is Witten here -- you need to contact support or write them a note on product feedback page.

I'd like to know too, specifically for the MacPro 2019

This page is saying yes - https://eshop.macsales.com/blog/96473-macos-15-sequoia-2019-mac-pro/.

I just upgraded and my NVME is no longer accessible... I think the problem still persists... I am using an Insignia NVME enclosure from Best Buy

which Driver are you using with it? {AppleRaid, SoftRAID, Disk Utility (plain), other}

Plain disk utility...

I can confirm the issue still exists. Apple should provide an solution as soon as possible. Might be the next update.