Considering every non-cash asset is wildly over-valued right now, I don't know that I believe any non-health startup (that I've heard of) is undervalued.
I have a lot of faith in Rivian, for example, but they're valued ar $80B before even selling a single vehicle. Look at what happened to Workhorse if you think that's reasonable.
Moderna's market cap is only $170B, which seems low considering their potential to make hundreds of billions annually if they find even one new application of mRNA technology (e.g. cancer treatment).