Uno seem to be starting to go down the enterprise support route - plus open core with their recent Figma plugin release. At least the Figma plugin is very tangential to the core product so it's hard to imagine it competing for features at this stage.
Though with the recent spate of open source company rug-pulls, and I'd struggle to justify using it. It seems like open source is increasingly just being used to build market share, then the VC/PEs come in, make a "contact us" enterprise pricing page, and suddenly issues and PRs start getting rejected because they compete with the paid add-ons.
I really hope the same won't happen with Uno, because it looks like a great library, and something that's missing from the dotnet world. Their sustainability blog post gives me hope, but... sadly it would not be the first time that founders with good intentions find out that running an open source company is nearly impossible, end up taking funding to keep up, then the rest is history.