Sorry to hear your current theme doesn’t include the ability to customize the footer, or add a custom menu to it. That’s fairly commonplace these days, so it’s surprising to see a theme that doesn’t support that functionality.
I’m not aware of any plugins that automatically add a menu to your footer. That would be tricky, since every theme is slightly different, so a one-size-fits-all plugin wouldn’t work across the board.
My recommendation is to reach out to the experts at Codeable.io and have one of their developers add a menu to your footer. That shouldn’t take them more than 30 minutes. Then, you’ll have the ability to insert a menu from now on.
You can reach out to the Codeable team using this form on our site, and they’ll give you a price quote within minutes: https://www.wp101.com/help/
Hope this helps!
Thank you! I appreciate your help