wpa_supplicant should also support TLS 1.1 and 1.2
The wpa_supplicant shipping with Alpine apparently builds with TLS 1.0 support only.
See the following lines that are commented out (by default):
https://gitlab.alpinelinux.org/alpine/aports/-/blob/master/main/wpa_supplicant/config#L310 https://gitlab.alpinelinux.org/alpine/aports/-/blob/master/main/wpa_supplicant/config#L317
Those lines should be uncommented and the package rebuilt to be able to take advantage of TLS 1.1/1.2 (although TLS 1.1 is also considered obsolete as of March 2020).