2) Click the activate button on the odd page to set the header and footer of the odd page in the header and footer settings.
3) As above, set the page text of even pages.
4) If you need to set a different header for each page of even pages, you can start from the second page of even pages, activate the page, select Insert-Delimiter-Continuity, then double-click the activated header, and click the "Same as before" button on the header toolbar to enter the required header and confirm closing.
5) Repeat on the page you need 4) Set the header you need.
In other words, select Insert-Delimiter-Continuity from the page you want to start, then double-click the active header, and click the "Same as before" button on the header toolbar to enter the header you need and confirm that it is closed. I just experimented, too. It's all set.