HaLow Wi-Fi has now been tested at 9.9 miles — new Wi-Fi world record is a near 5X increase over previous best

Are there any microcontrollers that support this natively? I could do some neat stuff with this kinda range and solar powered stations.

The example most people use are farms. The problem often isn't range, it's power consumption. The soil moisture sensor or the cow health tracker a mile away needs to run on batteries for a long time.

Unless you need high data rates, LoRa would be a better option instead of wifi. Especially if you need a new chipset anyway.

Also, on range alone, people are pushing LoRa to insane distances: https://hackaday.com/2023/09/15/new-lora-distance-record-830-miles/