We do not have any further information at the moment, as soon as an exact release date is known we will be happy to announce it, the product page of the 7R IV would already be up here: https://www.digitec.ch/de/s1/product/sony-alpha-7r-iv-61mp-10fps-wlan-kamera-11481613?supplier=406802&tagIds=520

Thank you very much!