Hori has released the Split Pad Pro Attachment for the Nintendo Switch, which gives its Joy-Con-like controllers a way to connect via a wire to the Switch dock. It works in practice, but its value is so-so for a $79 wired setup.
Hori Split Pad Pro Attachment review: I'm not attached - The Verge
Features Turn your existing Split Pad Pro or Split Pad Compact for Nintendo Switch™ into a wired controller for TV Mode with the NEW Split Pad Pro
Split Pad Attachment for Nintendo Switch™
Hori Split Pad Pro - Honest Review
Hori Split Pad Pro - Honest Review
HORI Split Pad Compact Attachment Set for Nintendo Switch, Nintendo Switch OLED Slate Gray
The best Nintendo Switch controllers - The Verge
HORI Split Pad Pro Attachment Set - Ergonomic Controller for Handheld Mode & Wired Controller - Officially Licensed By Nintendo - Nintendo Switch; : Everything Else
Hori Split Pad Pro review: The best Nintendo Switch accessory for handheld mode? - Polygon
Hori Split Pad Pro (Red) for Nintendo Switch Enjoy the full-size controller experience in handheld mode with the HORI Split Pad Pro! Featuring full-size analog sticks, a precision D-pad, and large shoulder buttons designed for comfort and accuracy, even during marathon gaming sessions. Advanced features include assignable rear triggers, Turbo functionally, and more. Perfect for high-pace action titles and many other genres.
Hori Switch Split Pad Pro + Attachment Set
Hori Split Pad Pro - Honest Review
Hori Split Pad Pro Review: Don't Throw Away Your Joy-Cons
Hori Split Pad Pro (Red) for Nintendo Switch Enjoy the full-size controller experience in handheld mode with the HORI Split Pad Pro! Featuring full-size analog sticks, a precision D-pad, and large shoulder buttons designed for comfort and accuracy, even during marathon gaming sessions. Advanced features include assignable rear triggers, Turbo functionally, and more. Perfect for high-pace action titles and many other genres.
Hori Switch Split Pad Pro + Attachment Set