Linear Reviews adds slide to merge on iOS and Android
Linear added slide to merge to Linear Reviews on iOS and Android, so you can merge a pull request from your phone with a swipe.
In Linear's clip, a sheet under the diff reads "Merge via merge queue" and notes that the branch will be deleted after the merge. It names the target and source branches above a slider labelled "Slide to merge".
Mobile Diffs reached the Linear mobile apps earlier this month, and merging approved changes was already on its list of things you could do from the Reviews tab.