I like the expression "never underestimate the power of the default app" (already used in this thread). Well this did not work for Google and Microsoft. So is this gonna work for apple ? I can't say cause I don't have any apple product to test...
[1] https://www.microsoft.com/en-us/microsoft-365/microsoft-whit...
[2] https://workspace.google.com/products/jamboard/
[3] https://www.figma.com/figjam/
[4] The others are MURAL/invision at 2B (not including Lucid)