only Sony TV's with the X-1 extreme, or X-1 ultimate processor will support Dolby Vision. the rest will not. 2017 models 930E and better, 2018 models X900F and better.

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• [/r/sony] Sony XBR series with Android tv doesn't have Dolby Vision?

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should be coming in a firmware update. it was the same for HDR support. Except Dolby requires more licenses

Edit: OP's TV won't though - https://www.reddit.com/r/AndroidTV/comments/9ya0p8/so_sony_xbr_series_doesnt_have_dolby_vision/ea14iat