Yes many girls do what is called fat cycling. In theory once you are where your hrt levels are supposed to be at consistently as you lose weight or fat you will lose fat from where you had fst stored as a man, when you gain fat since your hormones are now where they should be with estrogen between 100-200 and testosterone bellow 50 ( those are just easy round numbers not specifically for the country you life in) that new fat will be deposited in feminine areas typically for fat storage.
So girls will lose weight with the intention to gain weight, maybe two weeks to
a.mo the of trying to lose weight and the two weeks to a month of trying to gain weight.
In theory it is supposed to help redistribute fat quicker for a more feminine body