Unused Components: It looks like the ESP32-DEVKIT-V1 (U1) and several logic level converters (U2 and U3) are not connected in the provided schematic. Assuming these components are meant to be used, consider adding the necessary connections:

Power Connections: Ensure that all components requiring power are connected to an appropriate voltage source. For example:

Signal Connections: Make sure that the signal pins are appropriately routed to the designated components or I/O pins. Check if the connections between the multiplexer $U5$, $U6$ and connector $J1$ align with the intended signal paths.

Additional Details: Ensure that all components' reference documents, such as datasheets, are checked for specific part requirements, such as pull-up resistors, decoupling capacitors, etc.

Review Nets: The nets listed do indicate connections, but cross-check if the labeling and connections meet the design requirements.