I authored a white paper on the topic of Oracle EPM / Hyperion 188.8.131.52 coming out of Premiere and Extended Support. You may have attended one of my ODTUG webinars or read some of my blog posts on this subject. But here it is all in one place!
Download it and share if you need to give higher-ups a "push" to get a budget approved to either upgrade to 11.2 or move to the EPM Cloud.
Safe Harbor applies to my statement below:
The patching sunset date for 184.108.40.206 is currently set to DEC 2021. 220.127.116.11 then moves to Lifetime/Sustaining support starting JAN 2022. Oracle could potentially change this due to so many of their customers having project delays due to COVID-19, but that is anyone's guess. As always, look at Oracle's official site for the latest direction on this subject.
Regardless of what Oracle decides, you will want to either move to EPM 18.104.22.168 or EPM Cloud before Microsoft ends support for Internet Explorer 11. I do not expect any sort of patch that would pack-port 22.214.171.124's support for Microsoft Edge down to 126.96.36.199.