For a deeper look into our Elektron API, look into:
Overview | Quickstart | Documentation | Downloads | Tutorials | Articles
the following page has obsolescence notices
Product Obsolescence Notifications | MyRefinitiv
I have also asked the Real-Time API Product manager to reply with any specific details for the APIs.
When we obsolete products we provide customers a 2 year notice period. When we drop support for an OS / compiler then the notice period is 6 months. These notices are sent out as 'Notifications' that you will be able to access on your company's MyRefinitiv account, as pointed out my Umer. Please feel free to post any specific API question on this forum or speak to your Refinitiv Account Team.
Please let me know if there is anything specific I can help you with.
You can also refer to the API Compatibility Matrix which has any relevant EOL dates
Documentation | Refinitiv Developers