“Continue reading” not on home page post, excerpts not all before more block

Hi there!
I’m new to this, I’m trying to be a smartarse but there’s a certain post I can’t get to show a “Continue reading” link on the home page for a post, this post to be specific. The post is just a couple of paragraphs of text, then a more block, then an image, and I can’t for the life of me figure out what’s wrong with it. You’d have to click on the post’s title to see it all. I’m using the Twenty Twenty-One theme (with a few CSS changes, tried disabling them) and tried disabling all the plugins (didn’t help, actually they’re all still disabled, guess it shows how much I need them). I also tried recreating the post from scratch (nada).

For a test I made a lorem ipsum post, and it contains two paragraphs of text, then a more block, then a few more paragraphs of text. It does get an excerpt and a “continue reading” on the homepage, but the excerpt isn’t all that’s before the more block, just what I’m assuming is the automatically generated excerpt. I tried adding lorem ipsum next both before and after the more block and the image block on the post with the meme, but still no “continue reading” link on the home page. I also tried changing the “post format” option to a few different ones, none of them showed the read more link.

Is there something I’m missing? Is it not designed to handle my unique brand of writing? Did I trigger an exceptional use case? Please help me. I’m at my wit’s end (and by that I mean my wit wishes to end up in peoples’ faces) and I’ve tried searching a zillion different terms and can’t find any fixes that apply to WordPress in general, most are a problem with a specific plugin or theme.

Thanks in advance for the help!

The page I need help with: [log in to see the link]