Device: Hisense/Roku 43H4030F3
Remote simulated: see below
Universal: UEI C4000 (for Spectrum)
Device code: see below

My Roku TV accepts commands from two different vendor remotes,

1. An actual Roku remote [vendor# 04FB, Goldstar] &
2. Universal TV# 11756 [vendor# 609F, Vizio?]

Universal TV# 12183 is also vendor# 04FB. It has many of the same keys, but not all of them.

Program your TV device button to 11765 and copy Exit to Last.
I also like to copy >> to Page-.

Program your TV device button to 12183.

1. Put EFC #00169 into the Replay button.
2. Copy Play button to Pause.
3. If you want the Sleep button, copy Last to a new key.

I like to make the following copies/moves

1. Menu to Exit,
2. Info to Menu,
3. OK to Info,
4. Left to Guide,
5. Up to Ch+,
6. Down to Ch- &
7. << to Page+

Program your AUX device to 11756.*
Cross-copy AUX >> to TV >>.

*If your AUX is already programmed for a different device, changing its code and changing it back will not adversely affect it.

(edit: reorder steps)