SoI have WhatsApp and you can see my 'last seen' etc
I have a few contacts that have hidden this so when I msg them I cannot see when they were last online nor do the ticks go blue when they have read my message. The only time I see 'online' with these contacts is if they reply to my message and start typing when I am messaging them.
Why do you think ppl have their 'last seen' hidden? I find it suspicious tbh