History of an area

If you want to set up monitoring, then filters in OSMCha + RSS feed are your choice.

Pascal Neis also has an RSS feed for monitoring newcomers in the desired area Create Your Personal OpenStreetMap Contributors Feed @ ResultMaps.neis-one.org and a list of new mappers by country https://resultmaps.neis-one.org/newestosm

p.s. Example, RSS reader that runs in the browser: Feedbro - RSS Feed Reader with built-in Rule Engine

Also, if you do not want to install additional scripts in the browser, then to quickly find edits, you can use Easy Changeset Viewer(ver 2023/09/24)

Yes, starting this year, accounts that are less than a month old can no longer make big edits.