Launch WhatsApp, navigate to the chat list, and choose the conversation you want to hide from your main view.
Press and hold on the selected chat until a menu appears at the top of your screen, indicating that the chat is selected.
Tap the archive icon (a box with a downward arrow) at the top to move the chat to the archived section, hiding it from the main list.
Check that the chat is now moved to the archived chats section, confirming it is no longer visible in your main chat list.