Increased Security With First Party Cookies

This is failing for me too. However, in my case, we have a collaboration portal and must ALLOW third party cookies. This is tied to Googles browser change. I've tried modifying the above irule and changed the set cookie line to:

set set_cookie [concat $set_cookie "; SameSite=None"]

However, this resulted in duplicate cookies and the collaboration portal connection failed. Changing the policy rule to:

value "tcl:[HTTP::header Set-Cookie]; SameSite=None"

also failed to work.

There has to be an easy way to modify the cookie value to Samesite=None to allow our Chrome users to continue to use the portal. I am a network admin and not a developer so any assistance is appreciated.