That switcher is not the real switcher, that is menu drop-down just for demo. You need to install the additional plugin if you need the currency switcher. So, edit your header and remove the elements from that connection blocks https://prnt.sc/xd8gv7
Also, I would recommend you to watch video tutorial for the header builder https://www.youtube.com/playlist?list=PLMqMSqDgPNmDu3kYqh-SAsfUqutW3ohlG
