Retrieve complete data of a property in an efficient way.

[hpofofo]

I am having a notion database , I am retrieving the data from the notion database , for each request in am retrieving 10 records and I am giving it as the API response, now the issue is :
I had a field called tags in the database and its a multi-select filed , every record will have one or more tags , so now we got a feature to implement which is, we have to show set of all the tags which are in the complete database in the tags field along with the 10 records which we sent as a response, i want the best approach to implement so that it doesn't increase the time of execution of the script