thank you for your reply. Actually I have already done this a few times in the past without success.
Just to clearify, the internal communication between devices which are connected to the WIFI of the MUDI works properly. The issue is only the WAN-OUT. It is not possible to reach the internet, although the iphone14pro which provides the hotspot, displays that a device is connect to the hotpot.
Do you need further logfiles or stuff to find out what the reason could be?
It looks like the iPhone only assigns ipv6 addresses to clients which are connected to the hotspot. Maybe this can be a reason. As I told you before, the issue happen via wifi as well as cable tethering USB connection.
633.631161] usb 1-1.3: new high-speed USB device number 5 using ehci-platform
[ 633.798977] ipheth 1-1.3:4.2: Apple iPhone USB Ethernet device attached
[ 678.501566] IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready
[ 678.508633] IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready
[ 680.111790] IPv6: ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready