default or selected kernelversion does not have config value CONFIG_R8169_VLAN.
Result is shown for kernelversion 5.4.69

VLAN support

configname: CONFIG_R8169_VLAN

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>Ethernet (1000 Mbit)
└─>VLAN support
In linux kernel since version 2.6.12  
Say Y here for the r8169 driver to support the functions required
by the kernel 802.1Q code.

If in doubt, say Y.