Hi there,
you can use the GenerateBlocks plugin:
https://wordpress.org/plugins/generateblocks/
1. Add a GB Grid block with 3 columns:
https://docs.generateblocks.com/article/grid-overview/
Note each column has a Container Block inside it that you can add a border and other styles to:
https://docs.generateblocks.com/article/container-overview/
2. Inside each Grid column container add a GB Query Loop block:
https://docs.generateblocks.com/article/query-loop-overview/
Select the Query Loop block, and in its sidebar settings you can Add Parameter.
Choose: Taxonomy
And then select Category followed by the Term you want displayed.
Repeat for each query loop