Issue in finding Tracking Id for Google Analytics
While creating property click on advanced option and enable "Create a Universal Analytics property". This will 
Then enable "Create a Universal Analytics property"
then lick next and complete the property creation, now you will have two different properties created. Now choose the universal property where you will find the tracking info. GA4 will not have tracking info.
There are 2 ways to get the Tracking ID in Google Analytics:
If you are using web properties, then Tracking ID is in Admin / Property / Tracking Info / Tracking Code, just as you noted in your question.
If you are using App + Web properties, things get a little bit more complicated. For Android and iOS apps Data Streams, there is no tracking ID as to have GA tracking, you need to add Firebase in your app and link your GA account with Firebase.
However if you are using a web Data Stream, you can get the Tracking ID (although it is called Measurement ID) from Admin / Property / Data Stream / Web.
You may read more details on this article https://analyticshelp.io/blog/google-analytics-property-tracking-id/