Catalina – Pages – ToC insert on page

I am preparing a diary for my club with Pages 10.0 on macOS 10.15.3 (previously I used other tools).
This is almost complete, but I'm having trouble inserting a table of contents.

I have a ToC that I can display in the sidebar but want to insert into my document.
This is a word processing document, and the first page contains text in multiple text boxes.

I was hoping to insert a ToC in a text box to the right of the boiler plate, but this doesn't seem to be supported.
I managed to insert a ToC, but it is on a separate page.
I could select this and copy it into the text box, but it lost the links to the table of contents

I used columns for other tools, but this doesn't seem to be possible.

There will only be fewer than 20 entries in the ToC, but I'm even struggling to keep it on the first page.
Can anyone suggest a solution?