The work of updating the UI component library started in December last year. You can read about the details (why this update is necessary, what will change, what will the new UI look like etc.) in this blog post.
By now it turned out that I underestimated the amount of work that has to be done to update the mobile UI so the end of February 2022 deadline couldn't be kept. Also while working on updating the UI component library other higher priority tasks keep popping up like fixing the broken favicons due to changes in the Google service or making security improvements.
Based on the current estimates the new UI component library will be available in Q2 2022. I would rather not specify an exact target date because of the complexity of the work and because of the ongoing adjustments that are required by changes in the 3rd party services.
Please feel free to reach out to me if you have any questions.