The first one I made (the temp, not the art). I just went to the meme generator, added the text headings, and empty boxes for the paragraphs. Change the color of the headings, then saved it as a template instead of "generate image" button.
I imagine my friend MC did similar on the second one. The difference being adding the colored background squares, probably so text is easier to read. Likely searched up a sqaure of that color, than reduced opacity