Most of this actually comes from opposition spending to Democrats. While many have assumed that crypto PACs’ opposition to Democrats was in support of Republicans, that’s not actually the case thus far. However, it's worth noting that in races where PACs have opposed candidates but have not supported any candidates (CA Senate primary, NY-16 Democratic primary), they are clearly more focused on ousting candidates they view as anti-crypto rather than on supporting any specific candidate.
I’ve laid this all out in a new page: https://www.followthecrypto.org/spending.