I have just solved this problem by myself.
I am facing some more problems related to z-index in other elements of the website
On the homepage of my website (www.swayur.com), there are product sliders the problem is that I am not able to click the products fully on the DESKTOP. This means whenever my cursor pointer is between the two slider control buttons (left and right) then I can’t click on the product. I need to keep the cursor above or below the two slider control buttons.
Visit the website and inspect the two buttons (right and left) you will understand the problem.
Another problem is the product description on the product page. In this, some paragraphs are in bold and larger in font size as compared to other paragraphs. I am attaching a link for your reference: https://www.swayur.com/products/sri-sri-tattva-naoq19-tablets-60-n?pr_prod_strat=use_description&pr_rec_id=6b93fe087&pr_rec_pid=8133874057509&pr_ref_pid=8128330662181&pr_seq=uniform