Exact same situation here. Applied for sp extension + sowp extension on Feb 1, 2023.
Both expired on March 31st so we are on implied status since then.
Multiple webforms, no meaningful response.
At first, we thought the sp extension process times would be applicable to our application since the main applicant is a student. However, looking at where we are now, I think we should better follow the wp extension processing time which is 138 days at the moment. This means we're almost there, fingers crossed.