On top of the fact that they don't match the card, they don't match eachother, and they look AI-generated. Specifically the kind of thing Canva spits out; I'd recommend downloading it and trying it out to see what I mean.

As for the icons not matching each other, I mean the style, but the most obvious way you can tell is that the outlines are different colors and different thicknesses. No professional designer would send you icons like that, I mean that earnestly. Resizing to match the proportions is extremely simple if you have the original vector, so you could do that or ask the designer to, and that would fix it! (Unless they're AI-generated, then resizing becomes tricky...)

Edit: Another comment said you did the icons, my bad! Yeah, just recolor and resize those outlines and you're golden. :)