Does the Intel Killer Wi-Fi 6E AX1675 support Bluetooth, and what version is it?

Yes, the Intel Killer Wi-Fi 6E AX1675 supports Bluetooth 5.3.

What is the maximum throughput of the Intel Killer Wi-Fi 6E AX1675 PCIe Card?

The Intel Killer Wi-Fi 6E AX1675 PCIe Card delivers up to 2.4Gbps of throughput.

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Intel Killer ™ Wi-Fi 6E AX1675 PCIe Card, IEEE 802.11ax Bluetooth 5.3 Tri Band Wi-Fi/Bluetooth Combo Adapter for Desktop Computer | AX210.D2WG.NVXC

This add-on card instantly adds the world's first Wi-Fi 6E module designed for gaming capability to your desktop
This card is based on Intel® Killer™ Wi-Fi 6E AX1675 module
Supports the new 6GHz spectrum which allows gamers to game wirelessly with confidence because the 6GHz bands are not used by older, legacy devices
The AX1675 is a 2x2 6E module that supports 160MHz channels and Bluetooth® 5.3.
It delivers up to 2.4Gbps of throughput, low latencies, and the most reliable connections
Fits into any available PCIe slot from x1 to x16 links, and also supports Bluetooth® for easy pairing with keyboards, mice, headphones and other Bluetooth® gadgets
It is also paired with 2T2R extendable antenna to improve your Wi-Fi performance