I used openSUSE-Tumbleweed-ARM-JeOS-pine64.aarch64-2020.10.25-Build11.2.raw.xz
to build a system for my Banana Pi M64. After starting the system I do have an
IPv6 connection, but no IPv4 connection

I arrived at this test because I upgraded that system, which started with
2020.08.15-Build11.11. I configured that system, disabling IPv6. After the
upgrade I did not have an IPv4 connection anymore. The interface eth0 was UP,
but it did not have/get an IPv4 address.

Probably something is wrong with getting an address via DHCPv4.

I did have the older image and now I have a system with both an IPv4 and IPv6
address. So the hardware is OK.