It would be nice, to modify the channel grouping in Matomo like About Channel Groupings - Analytics Help.
I am not sure I completely understand that feature, but I think you could use Referrers Manager - Matomo Plugins Marketplace to replicate it.
Thanks. Is it also available in Matomo Cloud?
I don’t think so.
But if you think this is a search engine or social site everyone could benefit from, you could contribute it to the global list