hi.
I switched a rpi3b from armv7h to aarch64 by a complete reinstall.
After copying back most of my configuration files, everyhting is ok, except the OneWire temperature probe.
In fact, I noticed that there was no built-in module for w1-gpio, so I compiled one (only the module following the wiki page https://wiki.archlinux.org/title/Compile_kernel_module) , but that did not change anything.
So, beside $this->bbcode_second_pass_code('', 'dtoverlay=w1-gpio'), in config.txt, what is needed to get w1-gpio up and running aarch64 on a rpi3b