Canva embedded links are not showing up in WordPress posts, how to fix it?

I designed a press release using Canva and wanted to embed it into a WordPress post. I followed the usual steps:Get Canva's embedded linksThen in the WordPress editor, use the "Custom HTML" option to insert it. However, the press release does not display properly, either in preview or publish. Has anyone experienced a similar problem? This could be the result of the Canva's iframe restrictions, WordPress filtering HTML code, or some other reason? Is there a solution, like using a plugin, adjusting the site settings or switching to another embedding method? I hope those who have experience with this will share their suggestions! 🙏