Not strictly notation, though we have had threads about Affinity Suite before, particularly for vector editing PDFs from notation apps, or using music illustrations in DTP publications.
Canva bought out Serif some time ago, and they have now released a new version, which is one app, called "Affinity", rather than 3 different ones. It seems to have at least all the functionality of the old apps, if not more. Interestingly, it's free to use; though additional "Pro" and "Business" features have a subscription attached, from £13 (UK). These include AI features, stock content and cloud storage.
One thing to watch: there are a number of account settings for sending data back to Canva about how you use the app ("analytics"), and how much marketing they can send you. I don't think there's anything particular sinister here, and the "extreme" options are off by default.
If you already have the Affinity v2 app, I'd probably stay with them for the time being. They won't get any more updates, though. Perhaps worth waiting to see what reviewers make of it.
https://www.affinity.studio/