I used to be able to put a text watermark on photos from mobile app, How do i do it now?

[#1]

I had the ability to put a text watermark on my photos from my phone in the app but I had to take Lightroom off my phone for a bit to save space. Now I've recovered it but there is nowhere to add the watermark any longer! Am I missing it?

[#2]

I had the ability to put a text watermark on my photos from my phone in the app but I had to take Lightroom off my phone for a bit to save space. Now I've recovered it but there is nowhere to add the watermark any longer! Am I missing it?

[#3]

It is in the export dialog. You can only apply a watermark on exported images, not on the images you see in Lightroom.