The 20mm eyepiece is surprisingly a sensible accessory. It provides a mid-range, 35x powered image. I would call this eyepiece “usable”. The lens is uncomfortably small, and it is mostly plastic. Changing it with a better one would vastly improve your experience and image quality.
The focuser is mostly plastic, but it does its job without a problem. At this price range, a plastic focuser is normal.
The red dot finder is probably the part best of the accessories apart from the tripod. It is nicely attached to the optical tube. It is easy to align. It is easy to use. Attaching and detaching it is easier than most other telescope models.