Do you mean a 90 degree bend where it goes down vertically into the floor and further 90 degree bend where it goes horizontally through the wall to the external soil pipe.
Unless I've missed something you'll still just need one connector
Seen flexible pan connectors fitted in many different contorted angles, some better than others. Flexible connectors are great for slight misalignment of pan/rigid soil pipe and fitting back to wall pans.
Looking at your diagram there plenty of rigid connectors available,selecting the appropriate fittings depend on the bespoke installation.
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