Yeah all these consumer-grade air quality sensors are nothing more than a Sensirion SPS30 or a Plantower PMS5003 and a Wi-Fi module in a box.

To get more than just that you need to look at professional-grade indicative AQ sensors such as https://clarity.io/ and https://www.aeroqual.com/

These are what government agencies and municipalities use for dense sensor networks. E.g. https://www.breathelondon.org/

The clarity also uses the Plantower sensor. A high price does not necessarily mean better sensor modules.