Hi and hugs, this age is rough for sleep for many babies, especially due to those awful short naps!
Seeing your EASY would help, some babies need more than the average A time and it could be she is lower sleep needs. I'm happy to take a look though I appreciate others have looked before
How does she go to sleep currently? You asked in your post about resettling but then asked about sleep training?
When it comes to resettling honestly I do think it is liberating to consider the possibility that she may just not be one of those who resettles easily. DD was like that, she was lower sleep needs/higher than average A and I could never resettle. It was happier for all of us when I accepted that and found a way to work with it. So you may not ever have the classic 4h EASY but you may have an ok one, you just need to be a bit flexible.
So for example:
WU 7am and E
A 2h
nap 9-9.45
E 11am
A 2h
S 11.45-12.30
(no E)
A 2h
S 2.30-3.15
E 3.15pm (only 15 mins over 4h)
A 2h
S 5.15-6pm
Last A a bit shorter, say 1.5h
E and then bed for 7.30pm.
Thoughts??