Amazon.com: USB Hub Hat,USB to UART Onboard 4 Port USB HUB HAT for Raspberry Pi B+ / 2B / 3B / Zero/Zero W (4 USB Ports,Onboard USB to UART,Onboard Multi Indicators) :
Usbhub Usb2.0 Hub 4 Port Controller Usb Extension Module Gl850g Chip - Integrated Circuits - AliExpress
Amazon.com: Ethernet/USB HUB HAT Expansion Board for Raspberry Pi 4B/3B+/3B/2B/Zero/Pi Zero W/Pi Zero 2W,with RJ45 10/100M Ethernet Port (Based on RTL8152B Chip) and Three USB Ports,Compatible with USB2.0/1.1 : Electronics
Usbhub Usb2.0 Hub 4 Port Controller Usb Extension Module Gl850g Chip - Integrated Circuits - AliExpress
Industrial Grade Multifunctional USB HUB Extending 3x USB ports + 100M Ethernet | eBay
USB 2.0 HUB Module 1 to 7 Port Hub USB Expansion Module MTT Chip 7 USB Interface | eBay
New: Micro-USB-Hub-v2
2 PCS FE2.1 LQFP-48 USB 2.0 High Speed 7-Port Hub Controller Chip IC | eBay
USB Hi-Speed Serial/Hub Module - FTDI Chip | Mouser
Metal 7-Port USB 2.0 Hub w/ DIN RAIL Mounting Kit Japan NEC Chip
5 PCS FE1.1S SSOP-28 FEI.IS USB2.0 Hub controller IC Multiple USB converter Chip | eBay
VIA Labs, Inc., VLI 威鋒電子股份有限公司
Amazon.com: Waveshare Ethernet/USB HUB HAT for Raspberry Pi, 1x RJ45 Ethernet Port Based on RTL8152B Chip, 3X USB Ports Perfectly Fit The Zero/Zero W/Zero WH : Industrial & Scientific
A Tiny USB Hub For All Your Hardware Modding Needs | Hackaday