Version 6.3.7+231127
Not that this will solve your problem, but first things first: You are using a version of Limesurvey that has been released in November 2023, so this installation hasn't recevied any update, bug fix, security patch for almost a year now. I highly recommend to update to the latest version of LS6.x.
Now to your "problem": I don't think this is implemented in Limesurvey, also because this statitics feature is rather a help to follow the fieldwork progress than a full fledged analysis solution.
This being said, I have the impression that you are trying to use the Limesurvey reporting tool for analysis of results. I would suggest to use a proper tool that is better suited (SPSS/PSPP, spreadsheet software, JASP, etc).
I think the "other" responses you can only display as a list of answers, not as an item itself. This is not ideal, but the "other" item has traditionally been treated a bit differently then other items in Limesurvey. This is probably still a historical weight it is carrying.
Solution for the future (as I understand your server is/was already in the field, so you can't do much about this anymore): You could create your own "other" solution by not using the other feature of the question, but rather create your own "other" answer item as if it would be a "normal" answer item like the others and then create an open ended question with the condition that they have answered the item "other" in the previous question. Then you should be able to filter for the "other" option.