It seems that Adobe has plans to release Photoshop CC fo iPad in 2019.
Probably the same plan as with LR CC, free, but to gain the full sync
features a Creative Cloud subscription would be required. Currently I have
the 1TB plan for $14.95/month.

https://www.macrumors.com/2018/07/13/adobe-photoshop-ipad-2019-report/

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Regards,
Savageduck