Static hostapd and ethtool packages, based on the latest git version. Updated weekly. They are build with musl, so are not glibc dependant, if you were thinking about that.
On archlinuxarm my repo is already installed, so just type:
pacman -Syu ethtool-static-git hostapd-static-git
On Debian/Ubuntu first install my repo:
echo "deb [arch=arm64] http://ftp.woudstra.mywire.org/apt-repo stable main" | \
sudo tee /etc/apt/sources.list.d/ericwoud.list
sudo mkdir -p /usr/share/keyrings/
sudo gpg --batch --yes --keyserver "hkps://keyserver.ubuntu.com:443" --recv-keys "DD73724DCA27796790D33E98798137154FE1474C"
sudo gpg --batch --yes --output /etc/apt/trusted.gpg.d/ericwoud.gpg --export "DD73724DCA27796790D33E98798137154FE1474C"
apt update
apt install ethtool-static-git hostapd-static-git
This repo is used in the Ubuntu image build with buildR64arch script.
Or just use my experimental Ubuntu image 
(are being rebuild as we speak, so available after an hour or so)
Or build up sdcard yourself with my script, now Ubuntu available. It is quite new, so expect bugs.
I do not have a wifi card for my R4 (yet), so there is no default hostapd config for the R4.