Hopefully the following very basic continuity map is useful and hopefully it’s self explanatory.
color > color is continuous. All resistors measured in circuit.
Worth noting, orange = 1V8 rail, a failure/bridge on any of the highlighted could potentially result in the bad resistance readings you measured before. Also might be worth removing the joycon connector to rule out corrosion/liquid jammed inside.
While it’s not as likely to suffer via damage this side, it’s feasable considering it’s close proximity to the SD connector.