No Training Status or Training effect no matters I have a power meter activities for 3 months already

What device do you use? Does it show the training status? Training status is calculated by the device, not by Garmin Connect.

Edge 1000

To get a Training Effect from an activity requires a HRM to be connected during the activity

See https://support.garmin.com/en-GB/?faq=xlPIPCGvIL71AShlSZy9L6

"Training Effect is calculated based on user profile, heart rate, and the difficulty of an activity."

And from https://www8.garmin.com/manuals/webhelp/edge830/EN-US/GUID-7275629E-743A-4658-A284-C84F42A66AE5.html

"Training Effect is determined by your user profile information and training history, and heart rate, duration, and intensity of your activity."

Is your HRM connected and are you getting a HRM plot in your activities?

Perhaps that is the reason... but if a device does not support some features, the best garmin can do is to don't include it as an option when displaying the information. Like other new features from the 830  like flow descent, etc. they don't show up on my reports, but on my friends who have the 830 they got it.

yes, I use a chest HRM and a left side Stages power-meter.  That's why now I can see my VO2 max but unfortunately not the training effect. 

basedon on this information, it supposed to be supported

https://support.garmin.com/en-GB/?faq=xlPIPCGvIL71AShlSZy9L6

"Devices that will show Training Effect as a data field:

• D2 Bravo
• Edge 520 Plus/820/1000/1030"

After some chat with Garmin repr, it looks like that page is wrong on including the edge 1000 as well as connect to mention those under the "Reports" section.