Some do, some don't....some are quick, some take forever....somewhat depends upon what "competition ready" giants are at her gym, also. DD old gym didn't have them giant (IF they could have 10 start values without) at L7 unless they had nice, consistent giants with good form - but boy did we see LOTS of sketchy giants out there!
new gym wants giants for all L7 or they do L6 (DD went L7 before new L6, so different story), and there are kids even at L8+ whose giants would not have been acceptable at old gym - this difference has been a challenge for DD, who is "giants challenged" - she has had them off and on on real bars for 3 years now - but she's built more like Simone Biles than Nastia, and giants/swinging stuff will never be as easy for her...this year she may even go L8 but not giant or giant only once - as she can fulfill requirements with other skills...
However, she has friends who got their giants easily and quickly....but can't CHS...so no reason to worry yet!