Drupal 8.x

Hi,

I am working on drupal 8 to 9 upgrade.

I am using tealiumiq contributed module (https://www.drupal.org/project/tealiumiq/), this module is not compatible with Drupal 9 version.

There is a patch https://www.drupal.org/files/issues/2021-03-08/d9_compatibility-3202186-... available to resolve this issue.

How to implement more than one custom metadata for the home/landing page?

How to cache the data received from external API to a DB table for a period of 24 hours in drupal 8?

After updating the user permissions and cleaning the cache, I am in trouble.
In the permissions I indicated that any authenticated user can create the Trial content.
I later changed the permission and indicated that only the user with the Operator role can create the Test content.
After clearing the cache, the Operator user, despite having the authorization, receives the message access denied, you cannot access this page.
I re-cleared the cache and launched cron but nothing still doesn't work.

Until the d7 version i was used to removing them this way:

#edit-field-something-else-und > div:nth-child(1) {
    display: none;
}

but now I don't know how to do it, and I didn't find anything with the search.

Now, it's true that the N/A has the input id "edit-field-something-else-none" in D9 version, easily hiding by CSS, but it's also true that the N/A label is nested to the upper <div> like all other labels.
So a "display:none" would hide them all.

What other solution is possible?
Many thanks 

Using Drupal 8.9.14

I would like to have a content type PERSON with these fields

* first name (single field, non-repetitive)

* family name (single field, non-repetitive)

* living place (a triple, repetitive multiple times)

   - city

   - from date

   - until date

How can I do that?

Thank you