Possibility to fuse different sensor's data?

Is it possible to combine, e.g. Sentinel-1 GRD with Sentinel-2 L2A data inside scripts?

If not, is it something in the future roadmap?

Not yet, but planned to come this year

Additionally… is it possible to access data from surrounding pixels (potentially around the whole tile) from within the script? Or you can only access to other pixels in the temporal dimension?

Thanks again

For the moment, only single pixel based processing is supported. We are looking into object-based processing as well, but this will take a bit longer as it is complicated to do it at scale.