Comment by Stefan-H

See my other comment, but the answer here is resoundingly "No". For the communication to be end-to-end encrypted the payload needs to be encrypted through all steps of the delivery process until it reached the final entity it is meant for. Infrastructure like cloudflare generally is configured to be able to read the full contents of the web request (TLS interception or Load balancing) and therefore the message lives for a time unencrypted in the memory of a system that is not the intended recipient.