I think that Both Directors View and Object Eraser tool is a software feature and it deserves to be on the S10 and the Note 10 Series. If samsung is bringing updates, it has to be remain the same except for hardware feature. Samsung can exclude feature that requires a hardware. But thet cannot exclude those features on the newest smartphones. It is not fair for not adding those software features that was included on the latest smartphones and I want to see those two features to be included on One UI 4.0 or Android 12 on the Galaxy S10 and Note 10 series including Directors view on S20 and Note 20 series.
The reason Directors veiw is possible on the S21 is bc the Snapdragon 888 has a triple ISP (image signal processor) so it can support recording from multiple lens at once. It's not a software issue it's simply the hardware doesn't support it.