Inquiry regarding gut health management and nutritional supplements when taking antibiotics after surgery

I have surgeries coming up, such as plastic surgery, dental implants, or ophthalmic procedures (LASIK), and I am worried about my gut health as I anticipate taking antibiotics.

Does anyone have any practical experience or recommendations regarding the appropriate timing and products for gut-related supplements like probiotics and glutamine when used in combination with antibiotics? I am also curious if they help with immunity and wound healing.