Change # of Posts Displayed on Page

Hi

I’d like to display more than 10 posts on the main ‘loop’ or blog page on my son’s website. Right now it is only displaying 10 posts. How can I make it so this displays more (i.e. 50 or 100 or whatever the number).

I went into Editor > Template Parts > Loop

And went into the “Code Editor” and changed the “perPage”: number from 10 to 100. In the Editor view, this Loop template is displaying more posts but after I saved it, this change is not reflected on the live/published page.

<!-- wp:query {"queryId":1,"query":{"perPage":"100","pages":"100","offset":0,"postType":"post","order":"desc","orderBy":"date","author":"","search":"","sticky":"","inherit":true},"displayLayout":{"type":"flex","columns":2},"layout":{"inherit":false}} -->

Any help would be appreciated!

Additional question:
How would I go about changing the look of the Post page so that it displays posts similar to the Beaumont theme. We like the Bjork theme but also like the simplicity of the way Beaumont simply lists the posts.

Thanks
Stephen

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