I guess it would depend on how big the church is. Our church is rather small and I can think of at least one person who cannot make it to church because of mobility issues. He is there in the live stream each and every Sunday. I am back and forth between watching the live stream and actually attendance. BUT--had I been watching the livestream and I didn't see him post an Amen or I Love that hymn or say anything---then yes I would be contacting his wife to ask her if he was doing ok. Albeit, we know the family quite well. But I don't think someone noticing someone wasn't in the livestream chatting (especially if they usually do) and following up on "is your mom feeling ok, I didn't see her in the live chat today" is unusual.