This page explains how to get online via a wireless connection with your Nintendo Switch.
Your Nintendo Switch Won't Connect to the Internet? Here's What to Do
How To Connect WiFi Extender with Ethernet - ElectronicsHub
How to Connect to the Internet Using a Wired Connection - Support - Nintendo
Solving Weak Wi-Fi For Nintendo Switch (Multiple Options) - Home Network Informer
Nintendo Support: How to Connect to the Internet Using a Wireless Network
How to Set up a Home Wi-Fi Network
Internet connection (with a wireless connection), Nintendo Switch Support
How to Connect to WiFi Network in Nintendo Switch?
How to Connect Switch to a Hotel Wi-Fi: 3 Easy Ways
How to connect your Nintendo Switch to Wi-Fi
How to Connect Switch to Hotel Wi-Fi - Alvaro Trigo's Blog
Switch] Can I use my Nintendo Switch Pro Controller with a wired connection?, Q&A, Support
FAQ - Nintendo Switch - Nintendo - Official Site