Below is column block. It’s not under common blocks but you can find it if you open some of the other kinds of blocks.
I clicked the 3 vertical dots in the image area and then “Insert Before” to get this text here.
I clicked “Insert after” to put this below the image.
More text below the image.
I installed a plugin called Kadence Block. Below I inserted I Kadence block > layout and chose the 3 column layout. Click the Kadence Block Controls icon next to the gear (top right) and then Block Defaults >Column, to change padding/margin. I haven’t really played with it but try it and see what happens. Here’s the site for the plug-in which might help you. There’s a video tutorial.
“Insert Before” text
This is a paragraph block added below the image, made italic & bold and aligned center.
Aha! 2 images and a text area in one column!
This one is just a paragraph. Then I hit Enter and clicked the + to add an image.