I followed the way but vpn doesnt not work

[sogo_singer]

Dear. whom that read this,

Hello, I wanna connect VPN Gate with my iPhone. I follow this way. ( https://www.vpngate.net/ja/howto_l2tp.aspx#ios ). But it doesn't work. Helpe me. I will be out side of great fire wall by noon of Monday (GMT+9).
Enviroment: iOS latest ver.

I wanna connect this server.
public-vpn-192.opengw.net

Setting
Type IKEv2
Description: VPN GAte
Server: public-vpn-192.opengw.net
Demote ID: vpn
Local ID: vpn
Iser Authentication: None
Use Ceritification: off
Secret: vpn
Proxy: off

HELP ME

[solo]

I wanna connect VPN Gate with my iPhone. I follow this way. ( https://www.vpngate.net/ja/howto_l2tp.aspx#ios ). But it doesn't work.
...
Setting
Type IKEv2

Note

We are currently considering supporting other protocols that are easy to use with Android 12, such as IKEv2, in the near future.

https://ja.softether.org/9-about/news/903_211111

Meanwhile get OpenVPN or SSTP app.