I think implying that he doesn't support those isn't necessarily in line with his previous statements.
He's previously made statements in favor of at least universal healthcare, and it seems incredibly unlikely that he doesn't support sick leave policies.
Also, you shouldn't refer to universal healthcare/single-payer as a concept with "Medicare for All." Medicare for All is a compromised American policy proposal inferior to what most countries have had for years.
Medicare for All is the only meaningful proposal with mass support inside the Overton Window of American politics right now. I’d prefer a robust national healthcare service, but that’s not on the table.
Watsi is more akin to GoFundMe for care in the developing world, which, while admirable, has little to do with creating a universal healthcare system anywhere.
He's previously made statements in favor of at least universal healthcare, and it seems incredibly unlikely that he doesn't support sick leave policies.