Nick here from Shopify. Great question.
I looked into this for you and was wondering if simply adding some drop-down menus natively or via an app from the Shopify App store would work, but it seems like what you're looking for would be more customized. I spoke to our theme support team and if your theme is a Shopify developed theme, it is something which they could look into helping you with. Would you be able to share a link to your theme and the theme name, please? Also, if you would like our theme support team to take a closer look for you, would the best email to reach you on be the email you signed up to the Community Forums here with? But this is possible to do.
Hope this helps and looking forward to hearing from you.
All the best, Nick
Thanks for confirming. I sent you an email to that address. If you for any reason didn't receive it, could you let me know here, please? If it was the right email then I will talk to you there. 🙂