Looks like the Roku Channel is no longer carrying 632 The Price is Right.
Sometimes these linear channels either switch to another channel number (not the case here) go to another FAST provider (FAST is basically just the free ad-supported linear channel providers like Roku LiveTV, Pluto, Xumo, etc), or sometimes they just leave for some unknown reason and then will mysteriously appear again as quickly as they disappeared.
I try to keep an updated list of the Roku Channel Live TV channels over in this Community Thread, and it was there last week.
Generally, most changes to the Roku Channel lineup, if any, seem to occur within the first week of the month.
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
The only reason that I used Roku Channel over PlutoTV was the ad system on PlutoTV messes up more then on Roku Channel. So sometimes you miss parts of the show more on PlutoTV. I reported this to PlutoTV, but they have not corrected this.