Hi i request you to please follow the below steps once and check again.
Step 1. Launch the Settings app.
Step 2. Tap General management menu.
Step 3. Tap Reset menu.
Step 4. Tap Reset network settings menu.
Step 5. Tap Reset settings button.
Note: It will just erase your network settings, Wi-Fi passwords stored and Bluetooth connections .
At this point I use Bluetooth tethering from S22U to Fold 5 lol
Same issue with fold 5 (f946b) (connected to wifi6). Few days started to use and always lost connection. With s22 ultra and other devices no problems. (Wifi AP U6‐Pro)
Recently on 21 oct 2023 there was an update and i update my fold 5. Now i keep disconecting from my 5 years old home wifi. Before the update there literally no issue the connection was good but not better than s23 ultra , especially the range it can reach my wifi. Now after the update i keep disconecting and reconnecting every 2 minutes and it is making my life harder. Samsung!!!