Short answer: no.
There is a small chance but most likely no. In my case never filled, and I'm more than 6 years into HRT. But being skinny enough (my BMI is 18/19) it can't be noticed (at least in my case).
If you google for "hip indentation" you're gonna see that this is a common issue among ciswomen. It happens because fat is stored on the thighs and on the love handles but not just over the pelvic bone. It is pretty common for ciswomen as you can see in Google. In fact, this is area usually filled as part of a Brazilian Butt Lift or Liposculture (you can check in Google or in surgeons websites like Dr Aslani's one).
I always advice against gaining weight as a way of feminization/beautification. And this is plain common sense: if just by eating a lot (and maybe taking more E) were feasible to get marilyns, scarletts, beyonce's or kim's curves... then well, every woman on earth would have that perfect hourglass figure right now.
Just a random quote from dailymail fem section:
QuoteSimilarly, 30 per cent of young women had an hourglass shape
Putting weight on love handles and waist is a very common issue for most ciswomen (60% put weight on these places). For transgirls who transition after finishing bone development... if you add to the equation a pelvic bone narrower than the average for cisgirls then the result looks pretty obvious.
Also you should keep in mind that fat "re distribution" happens when fat cells die (they live for 8 months) so they can be generated in other places. I think Lagertha explained the process nicely in a recent post. Putting weight right after starting HRT is folly. If you're lucky, you're gonna get belly fat that would slowly reposition into more feminine areas. If you're not lucky, you're gonna need to lose the extra weight (and this can be difficult on HRT). Best option is to wait until the 1 year mark (on HRT) and then gain weight slowly to see where it goes.
Hope it helped!