I was so disappointed when my Pi lost wifi after the November or December 2019 OSMC update. They have dropped support for the dongle I've been using for several years, apparently due to poor support from the manufacturer. One of the reviews here said it would work so I added it to the order to put it on free shipping. Connected it to the Pi and it worked right after turning it on. So if that bothers you, this will fix it.
Enhance Internet Speed with TP-Link AC1200 Wireless Dual Band USB Adapter (Archer T4U V1)
40 Review
Wi-Fi adapter D-link DWA-140, black
46 Review
TP-Link Archer T4U Plus AC1300 USB 3.0 WiFi Network Adapter
29 Review
High Gain Wireless Network Adapter - TP-Link Nano USB Wifi Dongle with 150Mbps Speed for PC Desktops and Laptops. Compatible with Win10/8.1/8/7/XP Linux 2.6.18-4.4.3, Mac OS 10.9-10.15 (TL-WN722N)
46 Review
π Juiced Systems Silver BizHUB USB-C Multiport Gigabit HDMI Hub with 3 USB 3.0 Ports, Gigabit Ethernet, 4K HDMI, SD/Micro SD, and USB-C Power Delivery
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HB-UMLS Sabrent USB 2.0 Hub with 4 Ports and LED Power Switches for Each Port
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π StarTech.com NETRS2321P: 1-Port RS232 to Ethernet IP Converter, Serial over IP Device Server - Black
5 Review
π StarTech.com NETRS232 Serial to IP Ethernet Device Server - DIN Rail Mountable - Serial Device Server - Serial Over IP Device Server (Black)
4 Review