Yes, there's a hole there...Very strange they haven't offered the M1 Pro in a desktop.
But the previous rumours of the M2, with faster single core CPU/GPU performance, maybe an extra GPU core, potentially even 32GB RAM capability, could easily leave the regular M2 out-performing the M1 Pro - especially the base, 8-core "binned" version. Even the now rumored "M1-and-a-half" could give the entry-level M1 Pro a run for its money. So, even if M2 isn't coming this week, it may be a bit late in the day to launch a new M1 Pro machine, until the "M2 Pro" is available.