Steps to reproduce the issue

Create a plugin that will change search input data, eg. rename from custom project to Joomla! data names, add input data, etc.

Expected result

The plugin should be able to access / change all search input data.

Actual result

The plugin can access / change ONLY sort input data ("o" and "od" parameters).

System information (as much as possible)

Joomla 4.4.3. Same in 5.0.3.

Additional comments

Problem is in components/com_finder/src/Model/SearchMode in populateState function.
Order input data is retrieved from "input data", and that is whay it is available for plugins (code).
All other data is retrieved from "input request data" and thats whay it is not available for plugins.
Changing $request to $input make it works as expected.