Hooks to transform some Hx tags to span

Hi,
Does the theme has some hooks allowing to transform some hx tags which shouldn’t be titles but just spans for me ?
For example i would like to transform “Shopping Cart” sidebar title h3 to a span
Or to change every h3 product title to just span like this guy already asked before : https://xtemos.com/forums/topic/product-listing-convert-h3-to-span-or-different-html-element/

Do you have some hooks or i need to edit each template file to replace hx tags ?

Thanks for your time

Best regards