Here is a link that is pretty comprehensive regarding the different Roku devices and their capabilities.
https://en.wikipedia.org/wiki/Roku
Newer Roku devices will not, some older Roku devices will but will probably be unable to be updated. (If they currently are able to be updated.)
You can see if the Roku device you are looking at is capable of being updated (still supported) here.
https://developer.roku.com/en-ca/docs/specs/hardware.md?fbclid=IwAR2ytxK8riNKJF8xjyWK6G-jxgz3_ba0I54...
Basically, time to get a new tv (or at least a newer used tv) if you really want to get the real benefits from a Roku device.
Roku Community Streaming Expert
Just another Roku user... I am not a Roku employee.
Insignia RokuTV, Ultra 4660, Premiere+ 3921, Express 4k+ 3941, Streambar 9102