I don't see my therapy in terms of progress. For me, it is about the endeavour and how I respond within the relationship. Development and expansion happens as a natural part of understanding my patterns, parts, conflicts, and so on but a focus on progress isn't really interesting to me. Although tracking the progression of the relationship is interesting to me - when do I feel closer to her, more distant, at what point do we reach an intimacy and so on - so maybe this is all progress by a different name.
I also think the areas of the work can contribute to a feeling of progress or stuckness. For example, I move across multiple areas and issues and this can feel like I am staying surface sometimes or at least for a while. I can also imagine that stuckness might come around if you are focussing on one issue and repeatedly revisiting it. I know this happens for me when the issue of my ex-therapist's abandonment comes back again and again - am I ever going to move beyond the distrust?
In terms of the virtual sessions, is there any room for taking work to those sessions which fit better in a virtual environment, for whatever reason. So not taking lighter work, but exploring the painful in a way which suits online. For example, it might be easier to watch/listen to something online, or you might be able to explore space between you in a different way, or edit imagery together, I don't know, whatever really. I have things I do in person which suit in person and things which suit online - it opens up different mediums and this in itself can expand the work. I realise you aren't looking for suggestions about this so feel free to ignore if this is derailing!