Share a link via WhatsApp, how is the order of suggested contacts determined?

Good morning,

Recently I wanted to share a website, where on my phone (iPhone) WhatsApp contacts are suggested to me in the top row, in the bottom row you can then select other apps such as Messages, Mail, Signal and WhatsApp itself.

My question is how this top row is selected. I realized that these are my most recently contacted chats, which makes sense, even considering the time when I last contacted them. But yesterday a contact sneaked in there who I haven't chatted with in over two weeks. They were even shown to me first, and that surprised me. So how come this "silent" chat is shown to me as recent? I'd like to know, of course, because I'm wondering if this person did anything to get to the top of my list, and how that's even supposed to work. Especially since I archived this chat. This morning, when I wanted to share a web page, the chat was gone again.

Maybe there is an expert among you who has insight into such small details:)