We have tested the Webwork-2.18 (Docker Instance) with LTI 1.3 and D2L recently and have been successful. If you are also using Brightspace and would like the convenience of seamless integration between Brightspace and WeBWorK that offers automatic login and grade transfer, then the newly revamped WeBWorK LTI 1.3 interface will help. The tutorial (https://sukhjitsehra.github.io/webwork-2.18/) will assist in configuring WeBWorK and D2L so that LTI 1.3 can be utilized.
In reply to Sukhjit Singh Sehra
Re: WeBWorK LTI 1.3 Integration with Brightspace (D2L)
by Glenn Rice -Thank you for posting this.