PlayStation trophies are private, so no PlayStation games or trophies can be shown. To fix: PS5 Settings → Users and Accounts → Privacy → Gaming | Trophies → Anyone.
Xbox game history is private, so no Xbox games can be shown (Xbox reports 448 achievements unlocked). To fix: Xbox privacy settings → Others can see your game and app history → Everyone.
Private accounts are re-checked every 30 days. Changed the setting? Use Check again in the Gamercard editor.