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Xfinity Streaming app not working with firestick on my tv as of May 24, 2023 ...

https://www.xfinity.com/support/articles/xfinity-tv-app-requirements says:

• ... your Amazon Fire TV and tablet devices must be running Fire OS 6 or later. 
• Any smartphone, tablet or Fire TV device running Android 6, Fire OS 5 or earlier isn't supported.

Some Fire OS devices may not be capable of running Fire OS 6 or higher and so won't meet the requirements of the latest Stream app. For the latest Fire OS version supported by your device see

https://www.amazon.com/gp/help/customer/display.html?nodeId=G2JXLC4L34GX73TE for tablets, and

https://www.amazon.com/gp/help/customer/display.html?nodeId=201497590 for TV devices.

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Hello, @BReal0684! Thank you for creating a post about your shared concerns with the Xfinity Stream App on your Firestick. Have you had a chance to review the comment left by @BruceW? If so, did that help? Our Digital Care Team remains on standby if you have any remaining questions.