Please install a “Twenty xxx” theme like “Twenty twenty-five”
No real solution here. It always happens from time to time, but you can mitigate this by manually triggering the cron at https://discussedthing.ct.ws/wp-cron.php
From what I can recall free hosting have APCu on, so you may install a plugin like APCu Manager.
No solution here. Same thing as the Jetpack issue.
Please go to your WordPress admin area > Settings > General and change http:// to https:// in your site URL and home URL.
No solution here, same as the Jetpack and loopback issue.