The Samsung Galaxy Z Flip earns a 2 out of 10 on our repairability scale (10 is easiest to repair):

A single Phillips driver takes care of all the screws.

Many components are modular and can be replaced independently.

Glued-down glass panels are an unnecessary barrier to entry for repairs, especially given the phone's lack of ingress protection.

Battery replacements are possible, but unnecessarily difficult due to poorly-routed cables and the lack of stretch-release adhesive.

The components involved in the folding process are likely to wear over time (even if you don't bathe them in purple dust), necessitating eventual replacement.