In VoLTE, does SPS should be configured every time when QCI1 is establishing?

Hi Experts,
In VoLTE, does SPS should be configured every time when QCI1 is establishing?
I know that SPS activation doesn’t have to happen but I’m asking for SPS config.

SPS is not mandatory for QCI1.

Yes, I understand that but with assumptions that is activated on the site.
I noticed on the last few DTs that SPS config is empty and earlier is worked fine with the same testing UE.
I think that is shouldn’t be some prerequisite for SPS config if everything is set properly so just to confirm that.

SPS is to save CCE resource, but not good for Voice Quality.
So I see all VoLTE logs not activated SPS.

Please check VoLTE drop as well parallel.
It might increase with SPS activation.

Not implemented in VoNR so far.
We do use UL prescheduling, though.
It’d be nice to have performance numbers from the field to understand how it’ll behave.

SPS was activated all the time and drop is fine.
Now the problem is that I don’t see SPS config in the DT, so trying to figure out if some bug in the eNB.