tysm, i'm glad you like it!! :D you can start by just removing three of those lines, which will automatically leave the other three centered like this:

but if you want them to take up the full width, you can change each col-6 col-sm-4 col-xl-2 into col-4, which will make them absurdly tall if you leave them as square images:

if you want to shrink them down again, you can then give each <a> tag a max-width, like so, and they will be evenly spaced:

let me know if that wasn't what you were looking for!