Questionable leaks online suggest that the upcoming Sony a7 V camera will have the same 33MP sensor as the Sony a7 IV:
The Sony a7 V is expected to be announced soon (November?). Sony Spain is currently promoting an Alpha event in Barcelona on October 16, and it seems that influencers have already been invited:
The Sony a7 IV was announced on October 21, 2021:
Sony A7 IV camera, HVL-F60RM2 and HVL-F46RM flashes officially announced
