Thanks for reaching out to the Roku community!
We recommend restarting your Roku player, go to Settings > System > System restart. If you have a Roku TV, Go to Settings > System > Power > System restart > Restart and unplug your TV for 10-15 minutes then plugging it back in to resolve the issue.
In addition, if performing a system update (Settings > System > System Update) does not resolve the issue of the Search option missing on your home page, please let us know along with any additional information you may have that would be helpful for our team in further investigating this problem.
Can you please provide us with the following information:
-Roku device model
-software OS/version (these can all be found in Settings > System > About)
-tracker ID when this issue occurs (when you see this issue occur, press the Home button 5 times, followed by the Back button 5 times)
-steps to reproduce the issue you are seeing
With more information, we will be able to assist you further.