How do I finish hand-sewing a seam?
What I would do at this point with your gloves, is to take the needle and slide it under that last stitch (I took a close look at your pic) leaving a loop behind, then take the needle and slide through that loop to create a knot, you may need to do this twice. Then, I usually push the needle into the material and leave extra thread inside the work, cutting what is super extra or bothersome.
Create the knot

Hide the extra


These stitches shown here are just so I can show a sample, my stitch work is typically better. Though when I darn, I let it get messy. LOL
happy mending sustainability lovers!