So far I didn't see any special news about Chelsea after Pochettino joined the team and it seems like Pochettino didn't show interest in hiring players yet, not at least they tried to keep the list private but the Chelsea I can see need a revolution and Pochettino should release many players they don't need to have the empty spot and hire the players he needs to have for the next season.
I expect to see Pochettino help Chelsea to be at the top of the premier league again in the next season 9f everything goes well.
The actions carried out by the new Chelsea coach are not striking at this time in the transfer market that has just begun. It's just that Chelsea currently seem interested in one of the AC Milan goalkeepers, namely Mike Maignan. But no deal has happened yet. And Chelsea is currently still focused on releasing several players who have accumulated too much at the blues club. And I also read the news about Chelsea also being interested in the hunt for Mbappe. but that's just a rumor that can not be trusted the truth. so it's better to wait for official news from Chelsea itself.