Pushing static routes to Mikrotik over dnsmasq

Hello! I need help!
I have rb951g-2hnd router and SoftEther VPN server, connected to my router over L2TP protocol. I want to config split tunneling with my VPN. I have configured dnsmasq on my VPN to push static routes with 121 option (for example: “dhcp-option=121,175.25.32.0/24,10.100.0.1”). But it’s not working! There are no pushed routes in Mikrotik’s route list. Why? What am I doing wrong?

Mikrotik hasn’t bought into the idea of using DHCP over L3 interfaces, including the L2TP’s PPP tunnel. So if you can use the bridge mode of L2TP on server side, that could be the solution; if you cannot, you’re out of luck.

Very disappointing news ;(
I hoped there is a way to solve this problem in OpenVPN style. OpenVPN server pushes static routes to Mikrotik with no issues. But OVPN is too slow for me. SoftEther VPN is much better. But I should forget about split tunneling with it I guess ;(
It’s very sad. Thank you for the answer!