You only need Wifi and Bluetooth, so not having cellular should not be a problem.
You also need to turn your VPN off.
Erm turn your 6S off
luetooth Sharing: Bluetooth Sahring: On When receiing items: Ask what to do Fodler for accepted items: zDownloads When other devices browse: Always allow Folder others can browse: Public
For Airdrop to work you have to turn personal hotspot off, this may be the problem.
on iOS Airdrop works through the share sheet. Might be worth trying if you can send a file from your Mac to your iPhone - drag a small text file onto the iPhone icon in Airdrop in finder.
Make sure that your devices can receive AirDrop requests:
From the Apple support doc.
- Choose Apple menu > System Preferences, then click Security & Privacy. Click the Firewall tab, then click the lockand enter your administrator password when prompted. Click Firewall Options, then deselect “Block all incoming connections”.