Hmm. Not a medical professional AT ALL so just based on personal experience of having accident prone DC (!!) but glueing and stripping leaves a much messier eyebrow scar from what I have seen.
My older two DC have both had injuries to eyebrows and the way they were treated has made a major difference to how they have subsequently healed.
DS1 had a nasty tree climbing accident at 7 (much much more major than your DS's to be fair, he was bluelighted to A&E, had air ambulance on standby, CT scan due to repeated vomiting etc etc) and once the CT scan had come back clear, the doctor in A&E told the nurse to "glue and strip" the wound. The nurse then said to me that she could do that, and it would heal absolutely fine, but it wouldn't necessarily heal tidily or attractively because glue and strips will never do the job of stitches in closing a wound neatly. But obviously it is far less painful and traumatic for DC which is why they tend to opt for this.
However, DS1's injury was quite major, and the scar would have been large.
He ended up being referred to the maxillofacial team to have the wound cleaned/stitched under GA. It took a good few months to heal but the stitching brought the wound together beautifully and it is a really tidy job.
DS2, on the other hand, had a much more minor accident at 2 where he sustained a small but deep cut to an eyebrow that was glued and stripped. The scar is small but has healed nowhere near as well and is quite wide and messy. It's not a major issue but when I look at it, I am so, so grateful to the lovely A&E nurse who pushed the doctor for DS1's referral. In his case, the facial wound would have looked awful if she had just glued and stripped it.
Your DS's wound doesn't look too bad OP and certainly doesn't warrant a return to A&E but I would be tempted to message your GP surgery to see if you can get a practice nurse appointment to have a look at it. Even reassessing and reglueing/restripping once the bruising has settled a little might help a neater healing.