I've found only Ads API Sandbox on Twitter dev pages but this doesn't serve my purpose. I'm also aware that I can create separate account just for testing but would like to know if this can be avoided.
Concious this question was asked around 5 years ago and the answer was NO but would like to know if anyone is aware of any changes in that area.
No, Twitter does not have a playground / sandbox for API testing except for the Ads API.