Are the following sentences grammatically correct?
1. I have sent you an invite link for the meeting. or
2. I have sent you an invitation link for the meeting.
3. I have not seen your invite for the meeting. or
4. I have not seen your invitation for the meeting?
Please note my improved layout for your post. You failed to actually ask us a question or make a request in post #1. You must make it clear what you would like us to do. Whenever you give us more than one sentence to consider, number them.
I don't find any of them natural. For 1 and 2, I'd say "I've sent you a link to [join] the meeting" or "I've sent you an invitation to the meeting. The link is in my email". For 3 and 4, I'd say "I don't think I've received the link to the meeting".
I assume you're talking about an online meeting, such as on Zoom, where you need to send the link to all the participants in advance. Am I right?