Hey all, I don’t think it’s possible right now to use OAuth 2 PKCE in the HTTP Request node as per this post: Override redirect_uri in Node OAuth2 API - #2 by RicardoE105
So you might want to consider adding a feature request for this.
As for the general Twitter node’s upgrade to v2 of the Twitter API, maybe @sirdavidoff can provide an update on the latest status?