Demanding lil cuss isn't she!!!
Do you ever crate or xpen /babygate her ?
It sounds like she needs to learn "down-time" now that you've taught her how to play. There is a technique ~ can't remember what it's called ~ where during puppyhood you tether the puppy to yourself as a gentler means of teaching down/stay. As the puppy matures, you expand to tethering stations (lag bolt rings in the wall) whereby you begin to leave the pup at the station in a down /stay away from you but still in sight of you for longer periods of time progressing to you leaving the room/ being out of sight for longer and longer periods while she maintains the down/stay ~ you of course are watching covertly to make instant corrections when she breaks the down /stay.
I don't know all that much about Corgi's but my neighbour has a corgi-shepherd cross (cutest little thing) and she has ALWAYS wants to be the centre of attention since they adopted her and she experiences bouts of separation anxiety periodically when he is out. she also likes to chew and claw doors