@Mohamed Al Aryani fermented foods like Daniel mentioned can provide great support during and after treatment. I’ll also share supplemental support so you can choose.
During treatment, consider adding in a beneficial yeast called Saccharomyces Boulardii (which many of the fermented foods have).
Antibiotics wipe out beneficial bacteria and can lead to opportunistic yeast overgrowth. S. Boulardii can help “tame the bullies”.
Klaire Labs offers a product called ABx support which can be taken during the course of treatment and continued afterwards as well.
Focusing on replenishing/repopulating her microbiome for several months after treatment with beneficial bacteria from probiotic-rich foods and/or supplements is also helpful. Fermented foods offer the most variety and colony count. If choosing to supplement, a broad spectrum probiotic like Metagenics UltraFlora Biome Pro for example is another option followed by a soil based product like Megaspore by Microbiome Labs.
Hope she recovers swiftly!