How to use "tls_passthrough"?

I would like to pass tls certification from client request to upstream service. However, I cannot make it work. Could someone give me an example of Service / Route configuration?

Kong version: 3.1.1
Mode: DB-less

kong.yml

services:
- name: myservice
  url: https://www.myservice.com
  routes:
  - name: myservice
    protocols: [ "tls_passthrough" ]
    snis: [ "www.myservice.com" ]
    strip_path: false

Current I got this error

{"message":"no Route matched with those values"}