It was all covered in pollen and looked almost a bit 'drunk'
If you see bees that look like they're a bit exhausted and slow (sometimes it's quite clear with how they stop flying entirely and just slowly walk around), you can mix a bit of water with sugar and give it to them. They'll drink it up and get energised again within a minute. You have to be careful giving them honey though as it can contain diseases from other Hives that bees will then take back to the hive.
They're quite thankful for it too ;^)
Wow, I had no idea about this! Right after I took these photos, I carefully picked it up with a piece of paper and took it to my plants. I haven’t seen it since… I think it recovered and went on its way 🙏