You could ask if they treat with just abx, or do they also use herbals/supplemets.
Make sure they treat with more than one ABX.
What is their treatment plan going forward
Do they check for candida, mold issues, fungal etc.
What detoxing, probiotics and liver support do they suggest you use while you are on antibiotics.
How do they understand herxing and is there phone support on off hours if you need to call them with any questions.
How to they diagnosis and treat co infections, do they understand about the different infections.
Thats all I can think off right now, Take care others will be along to chime in