I can't find the Search box in the Help menu

Sorry if this is a too basic or silly question, but I’ve been looking for a solution to my problem for days, to no avail. I’ve just installed LO in my new computer. I used to have it in my previous one (the other is a Mac computer, the new one is a PC with Windows 10), and I’ve grown used to the “Search Box” that appears on top of the Help menu. But in the new computer, the box is nowhere to be seen, and as much as I look in the menu, the Preferences, and online, I can’t find the way to “activate” it. Can you help? Thanks.

What is your default browser ?
Which version of LibreOffice do you use?

OK, I think I found the problem: it’s not a LO feature, but a OS feature. Not available on Windows.