Eugen Rochko writing on the Mastodon blog:
Mastodon 4.3 just landed! If you’re a mastodon.social user, you might have already seen some of this in action as we’ve been gradually rolling out these updates over the course of the last 11 months in nightly releases, but we’re finally making a new stable release available to the community. If you use a different server, you will get access to these improvements once your server operator upgrades.
This one’s been in the works for a long time. The notification improvements are most welcome. I have been using the Phanpy Mastodon client for a while, partly due to grouped notifications. Glad this has functionality has made it to the official client now.