Jean-Michel Védrine has shared a Moodle Question Format Importer for Canvas LMS in the case you are moving from Canvas to Moodle. Due to variations in the QTI standard between learning management systems there’s no guarantee that your questions (some or all of them) will easily import to Moodle as QTI. QTI stands for Question and Test Interoperability Standard and is an industry standard (like LTI or Common Cartridge) for sharing learning resources across LMSes.
As a solution, Jean-Michel created and shared a plugin that allows questions from Canvas to be imported to Moodle. While it may need additional testing (please comment here with sample xml or specific issues) it’s now available to the community.
Download and follow the installation process here: https://moodle.org/mod/forum/discuss.php?d=269499