All Roku's that are not Sticks can have access to number commands via aftermarket universal remotes. In the case Roku tv's it will work on both Antenna er Live tv, and Roku Ch Guide. For Stand-Alone Roku like the Ultra or express then numbers only work on Roku Ch Guide and once you are tuned to live channel. The only maker of universal remote that will give you access to number keys for Stand-Alone Roku is UEI mode remotes under such brands as One-For-All, Inteset, Onn, and Insignia. Like this Onn from Walmart:
onn. R113663 6-Device Universal Remote - Walmart.com
One-For-All from Amazon:
One For All Universal 8 Device SteriTouch Antimicrobial Television IR Remote Control, Model URC3680 (amazon.com)
Inteset 422-4 on Amazon:
Inteset 4-in-1 Universal Backlit IR Learning Remote for use with Apple TV, Xbox Series X/S, Roku, Media Center/Kodi, Nvidia Shield, Most Streamers & Other A/V Devices (amazon.com)
For Roku tv's the code 4398. And the number commands are already preset to numeral pad via that code. As for Stand Alone the setup code is 3061, but here you have to map a 5-digit code for each numeral initially:
0- 00101
1- 00230
2- 00232
3- 00228
4- 00235
5- 00231
6- 00233
7- 00100 or 00108
8- 00106 or 00114
9- 00102 or 00110
Ch UP- 00183
Ch Down- 00185
To map these to keys:
1. Roku device
2. press and hold SETUP for two blinks release
3. enter 9 9 4
4. tap SETUP for one blink
5. enter 5-digit code
6. pick a key
Repeat for each command using a different 5-digit code in step Five and picking a different key in step SIX.