How to enable 0-RTT in http3 SSL ?

[Krishna]

Hello,
I have checked my site in ssllabs.com and it shows 0-RTT is not enabled.
Please suggest how to enable 0-RTT in http3 SSL ?
I am using letsencrypt, latest version openlitespeed in linux centos 8 cloud server.
Thanks

 

[Cold-Egg]

Hi, please check by https://www.http3check.net/ tool and share the result with us.

 

[Krishna]

Hi,
Thanks for reply.
I checked in http3check.net and it shows 0-RTT is enabled.
https://www.http3check.net/?host=https://datingso.com

when I check in ssllabs, it shows 0-RTT is not enabled.
https://www.ssllabs.com/ssltest/analyze.html?d=datingso.com&hideResults=on&latest

Please suggest.
Thanks