Roku dev mode not working after resetting. Model 4400x

Hi. My roku 4 ultra is no longer able to go into developer mode. I used to be able… But developer mode only on this device is no longer working. I already reset the device… But that did not fix it. Please help

I believe its been deprecated.

If you were using developer mode to sideload prohibited apps, you’ve been blacklisted. If you’re really a developer, contact Roku.

-JT