You can build an Excel add-in that lets users pick and run UiPath jobs. The add-in calls Orchestrator APIs to list available jobs and start the selected job, passing Excel data as input arguments. Authenticate the add-in to Orchestrator using OAuth or API key. This keeps the whole experience inside Excel without using Studio or Assistant.
It is little more than just triggering the workflow.
I would need to push the data from the active worksheet as an input arg to the job and then write the output at specific columns.
All in all, the user experience should be - I load the data into an excel worksheet, I run the job, I see the output on the same sheet.