In a relevant story, yes. Linus mentions his investment in Framework in each video it comes up. If they had already said it in this thread they'd I'd give it a pass.
Have you considered that the guy might be a bit rushed today what with, you know, completing a funding round and all that, and that it might have slipped his mind?
Good thing you gave him a pass though. Everyone's heart stopped for a second there
The previous comment talks about founder and ceo Nirav Patel. Comment you're replying to says "I wanted to do this", and is posted by a user named nrp. It's not rocket science.
It _is_ disclosed in their comment based on how it is worded. It is also in their bio. It is true that someone might write a comment this way even though they weren't affiliated with Framework, but then they could just as easily flat out state they were and lie.