Venting a master bath

Hi. I am not very smart with venting, and after some reading through the codebook I am confused about the venting.

Basically my bathroom layout looks like this.
From the furthest upstream fixture,
Watercloset
Lav
Shower
Lav
Tub.

I am not 100% sure that the stool is allowed to be vented this way, and I am also wondering if since the stool is the furthest upstream fixture does it cancel out the wet vent of the shower/lav/tub?

Thank you for your support lol!

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