That's an easy fix:
https://www.amazon.com/Chemisettes-Anne-Cleavage-Modesty-Cotton/dp/B08BY2TYR4/ref=sr\_1\_12?keywords=modesty+panel&qid=1649042412&sr=8-12
https://www.amazon.com/Chemisettes-Anne-Cotton-Cleavage-Modesty/dp/B09DGRWYMK/ref=sr_1_50?keywords=modesty+panel&qid=1649042143&refinements=p_n_size_browse-vebin%3A2343363011&rnid=2343347011&s=apparel&sr=1-50
https://krostrade.com/blog/how-to-alter-a-too-deep-v-neck-wedding-dress/