That is true. BypassIO seems to get disabled by everything. Not only Bitlocker. But also, split volumes. Indexing service. EFI partitions with only 100MB. Etc.
And it's also very limited, as it's a feature for Direct Storage. And with so limited adoption, it doesn't matter.
Also, this new driver also bypasses a ton of legacy layers, so it makes BypassIO a bit redundant.
And Direct Storage still works, it just doesn't do all of the BypassIO stuff.
With the stornvme.sys driver, BypassIO was working on my PC.
BTW, I prefer to have Bitlocker service disabled. After seeing Windows encrypt one of my drives without any input or authorization from me. Fortunately it was still waiting for me for the final go.
But after I saw several people only getting their drives encrypted by Bitlocker, and then not being able to decrypt the data and losing all of it. I prefer to have this service disabled.
Microsoft is too incompetent and untrustworthy for me to allow them to automatically start encrypting everything on my PC.