I created a new WordPress website and while I was updating a theme there will always be some issues in all the themes I used I am not good at coding and all, I just wanted to know that will change the theme of my website will affect the SEO of the site or not? here is my site https://www.techaroundnow.com/ for your reference is it working fine?

I created a new WordPress website and while I was updating a theme there will always be some issues in all the themes I used I am not good at coding and all, I just wanted to know that will change the theme of my website will affect the SEO of the site or not?