Embedding Social links

Hi,

Could you please assist as my social media posts that i’m embedding are not working?

1) In my post, I’ve tried adding a FB Post (Video) by copy pasting the URL into block and using the embed function but it doesnt work.
Is there a plugin i need to add or that you recommed?

2) My TikTok videos do appear in my posts as well as my in my widgets on my homepage. BUT, when i view the website on my mobile device, then these videos do not appear.

Thanks