Hi Caroline
Yes ya right an only dry food diet is not good as it does not have enough moisture and one of the cause of kidney disease when older.
Better to go with wet or raw but a mixture of wet and Little of dry is ok as thy will get moisture from the wet/raw.
With both dry and wet there are better brands and not so great brand. with the not so great brands there is so little actual meat and that is meat "derivatives" (crap off factory floor) and lots of grain so these are not good as a cat natural diet as a carnivorous is meat. They can't digest grain very well.
There are are also things like taurine which a cats body needs as it does not produce it, it is obtained in muscle parts of prey ie the heart. So a cat that doesn't hunt outside and eat prey will end it in their diet. This is one of the resins why cats hunt outside if their home diet does not have taurine in it .
So best if you can to try other wet foods, the good quality complete brands that have actual meat and excellent moisture in ie Thrive complete tins.
Watch out for others that say "complimentary " these are not everything a cat needs and should only be fed as a treat.
Then you can feed a bit of dry best is grain free if she will eat it. Also a good brand like James wellbeloved.
Grain free ones are applaws dry , taste of the wild from zooplus (that's grain free) both complete.
Applaws wet is only complimentary!
Try her on various and see what she likes