VTT Subtitles on iOS Safari

Hi, is it possible to exact subtitle array from a HLS manifest in iOS Safari, I am creating a custom player where I need to add subtitle switching button.

Can anybody help on this. I tried with mediaElement.textTracks but no luck on that.

Please Note: I am getting subtitles in VTT format in the manifest.
VTT Subtitles on iOS Safari
 
 
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