How to repeat a promise conditionally using rxjs

I would like to repeat an API call which returns a Promise, conditionally using rxjs.

The API method receives an id which will be changed on every call by adding a counter prefix to it. The calls will be repeated until the data met some condition or the counter reach to a specific number X. How it can be done using rxjs?

API method:

fetchData(id)romise<data>

try 1: fetchData(id)

try 2: fetchData(id_1)

try 3: fetchData(id_2)

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