Press "see inside" and check out some custom block workarounds of useful, but non-existent blocks.
I found out about these and how to make them here: https://en.scratch-wiki.info/wiki/List_of_Block_Workarounds#Non-Existent_Blocks I used a hacked block for one of my custom blocks from this hacked block collection by @qucchia: https://scratch.mit.edu/projects/382631312/