Board Thread:Support Requests - Getting Technical/@comment-39358160-20191203120531/@comment-1038387-20191203160035

^ That.

That's the usual implementation of galleries on portable infoboxes, it creates a tabber with all the images. If that's not what you meant of if your infoboxes do not use the portable format, you're going to have to give a link to the template and a link to a wiki that has what you want.