how to extract option 43 from systemd-networkd's dhcp client?

Just like how dhclient captures dhcp response and stores it in env, is there a way to capture information like option 43 from systemd-networkd's DHCP client and store it in env ? I have proxy URL stored in option 43 and I need to access that information. tcpdump shows response has vendor 43 data, but I am unable to extract it via scripts or from env. Is there any way ?