I think you need to read this medical paper sci-hub.se/10.1586/14787210.2015.991717 there isn't a consensus between the right course of action.
However it needs to be clear it is of no fault of her. It is like blaming someone for getting a headache .
This heavy antibiotics usage could however aggravate the cycle of recurrent UTI. It has now been shown that the microbiome is linked to them
sci-hub.se/10.1007/s10096-018-3322-7
and
www.ncbi.nlm.nih.gov/pmc/articles/PMC6893017/
(there are actually plenty more, but this is a good start)
My suggestion is that you start a course of probiotics but you must also change the way she eats, because just taking a pill of probiotics is like sending a rocket of human to Mars, unless you send food as well, they will die very quickly.
You should remove heavily processed food (all the processed snacks, crips, ...) , avoid very fatty food with refined grains, if you have these.
You should have prebiotc food every day (asparagus, onions, leeks, chicory, ...) , a high volume and variety of vegetables, swapping cereal breakfast for rolled oats, ....
Talk to your GP about removing processed food for 3 months and cooking from scratch using whole food (so making your own chicken schnitzel instead of processed one for example) and having a lot of vegetables, legumes and fruit.
Changing to a healthy diet is tremendously difficult with children, but your DD has the best motivation ever, getting rid of UTI. The cha age should be done for the whole family and not only her.
Try for 3 months, @Losingthewill01 nothing to lose, much to gain.
In the meantime, if she has synthetic or coloured underwear, swap to 100% white cotton ones. Actually I would try to eliminate all skin contact with synthetic material, so buy tights with a cotton crotch. If you are home from school, and no school uniforms, use plain cotton bottom (100%).
But I would seriously consider a 3 month change of diet combined with a strong probiotics