Is there a way to use Xbox Gift Cards between different regions and countries?

No there are not sorry.

Every region has their own Xbox Live service.

If you sell region free gift cards, this regions gonna suffer.

The only way to support Xbox Live in your country and to get more out of it, is to buy gift cards for and in your region.

Never had a problem with gift cards between different regions before. It failed when it was anything else, but gift cards seemed to work fine.

I simply purchase a gift card through Xbox, in my current currency of course, and provide the code to my friend in a different region.

Works fine and avoids lying about your region (aka breaking the terms).

yobrizo is correct with this. You cannot gift a game to someone in a different country/region than you. If you want to gift a game to someone in a different country, you best bet would be to either purchase a physical copy and send that to them, or purchase
a gift card for their country/region, and email them the code, then they can purchase the game themselves.

Hi,
I'm shella and would be glad to help you out.

One possible reason for this could be that the gift card was issued for a specific country or region, and the currency conversion between that country/region and the currency of your Xbox account resulted in a slightly different currency value. However, it's also possible that there is an error with the redemption process or the gift card itself.
I strongly advise you visit the link below with more details so they can look into your account for better assistance.

https://support.xbox.com/en-US/contact-us

I would be here incase you need more assistance.

Shella

U need a vpn and set it to uk and redeem it on ur phone it work for my friend when i sent him a gift card