To anyone concerned about being softlocked on the Great Sky Island if doing shrines in clockwise order

Turns out, Nintendo thought of this after all.

There is a hidden way across the lake north of In-Isa Shrine (Fuse)

Directly east is a hole

https://preview.redd.it/0cvzke6sw04b1.jpg?width=1920&format=pjpg&auto=webp&v=enabled&s=8fc7929dbc30b3a65dae89c80afe6cd8c8821a8d

This hole will lead you to a hidden path underneath the lake

https://preview.redd.it/tdx2vm2ww04b1.jpg?width=1920&format=pjpg&auto=webp&v=enabled&s=8bf7fdead75da5087b5da23df995bf2126289b2a

And from there back to the north side, from where Ukouh Shrine is just a short bit away.

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https://preview.redd.it/thhena8bx04b1.png?width=1920&format=png&auto=webp&v=enabled&s=432242f9bc2b3199a241c2307dfb45f90fc786cf