Here's a roundup of all the upcoming TTL/HSS Wireless Flash Trigger Systems from Sony, Phottix, Godox & Nissin for Sony cameras with Multi-Interface Shoe.
Vello Off-Camera TTL Flash Cords for Sony Multi Interface Shoe
Godox TTL Wireless Flash Trigger for Camera Bluetooth Connection 1/8000s HSS Control-Wheel Hotshoe Locking AF Assist Light - AliExpress
Guide to TTL+HSS Flash Triggers for Sony Multi Interface Shoe
Phottix Odin II TTL Flash Trigger For Transmitter For Sony – JG Superstore
Multi Interface shoe flashes for Sony cameras - Wim Arys
Godox XProS TTL Flash Commander Trigger for Sony How-To and Why
Godox TTL Wireless Flash Trigger for Camera Bluetooth Connection 1/8000s HSS Control-Wheel Hotshoe Locking AF Assist Light - AliExpress
Sony HVL-F28RM External Flash for Multi Interface Shoe
Guide to TTL+HSS Flash Triggers for Sony Multi Interface Shoe