Microsoft began adding ReFS Windows bootability support early last year. While some progress was gradually being made over the course of the year, the needle hasn't moved much since around August.
Windows boot manager RSS
Popular Windows configuration tool NTLite received its latest update. The new version brings an updated Windows Boot Manager, which was recently patched against a BlackLotus Secure Boot flaw.
Microsoft recently began patching UEFI bootkit vulnerabilities with this month's Patch Tuesday update. The company has now released a helpful guide about blocking such Windows boot managers.