Hi @rgb-law, there are a few possibilities for what’s going wrong.
The first thing to clarify is that by default in block themes like Twenty Twenty-Two, pages are already set to use the default template, called “Page.” So there’s no need to apply a different template to your pages unless you wanted to either use a custom template that you create from scratch, or one of the other templates that come with the theme, such as “Blank” or “Page (without Separators)”. If you applied one of those other templates to your pages, I’d suggest going back and resetting the template to the default for now.
Once you reset the template back to the default, do you see your content?
If your page content is still missing with the default (“Page”) template applied, what that means it that you probably edited the Page template itself and inadvertently removed some of the blocks that are required for your page content to be displayed, such as the Query Loop block or the Post Content block. What you can do to fix that, is go into your templates area and clear out the Page template changes you made, which will bring back all the required blocks.
Head to Appearance > Editor > Templates at
https://jazzchoir.org/wp-admin/site-editor.php?postType=wp_template
If you see a little blue dot on top of a template name, that means that you made changes to that template.
To clear out those customizations, click the three dots next to the Page template (or any other templates you modified that you want to revert back to the default) and select “Clear customizations,” as you see in this screenshot:
Once you’ve cleared out customization on the Page template (and any other templates from which you may have accidentally removed required blocks) your content should appear on the pages where it’s currently missing.
Let me know how it goes!
p.s. you might also like to explore some of these resources that explain how block themes work, and Twenty Twenty-Two in particular.