Yes, that's true what you read. The whole world has not fully
adopted 5G yet and there are many controversies revolving around it because of Huawei and USA. Many countries have actually given green siganl to Huawei to go ahead with 5G in their countries but it is still in development phase.
Japan being a technology pioneer takes a step ahead and plans to launch 6G by 2030. It is proclaimed to be 10 times faster than 5G. Japan's governments has officially specified budget in this field and they are gonna develop it on national scale.
There are still many concerns about health issues posed by 5G technology. Let's how it evolves with 6G because I can already see it is going to change our lifestyle dramatically.