SparkFun BMP581 sensor is not working with an Adafruit with a TCA9548a multiplexer

@oxygen02
Installation and Troubleshooting is for Problems with the Arduino IDE itself NOT your project. It says so in the description of the section.

Therefore I have moved your post here. Please be more careful where you post in future.

You may want to read this before you proceed:-
how to get the best out of this forum

Great, please keep it that way. Schematics like that are much better than Fritzing.
The details are missing though, you show three chips in your diagram, but do you mean the chips or do you mean a board containing those chips? If the latter pleas post a link to who's boards these are.