A very warm welcome to the forum! Good to have you.
I see you’re running our own kitizen Johnson’s excellent firmware in the ZyXEL modem, as do I in my four ZyXEL VMG1312-B10A modems.
One thing I did notice is that the upstream target SNRM is really high at 9.5 dB. Your downstream SNRM at 6.5 dB is either a tiny bit high or a lot high depending on whether it normally is at a target of 3dB or 6dB. I don’t know how many VDSL2 users get 3dB target SNRM downstream - I’m very ignorant about VDSL2/FTTC, being still on ADSL2.
Those high numbers are presumably just DLM after the storm.
I see a very high interleave depth in your downstream (the D framing parameter) and a large amount of forward error correction in the form of added RS CRC bytes (the R number). Again cautionary protective measures introduced because of the storm. The high value of R is slowing the link down because of added bytes of error correction information in the data stream not just your own data.
If you reset the modem then these numbers might change to something less paranoid. There are not many ES so no problems currently. If the SNRM targets do not drop down when you do so, then it may require waiting until DLM forgets about its fear of the storm.
So what to do. Wait a while, modem off for 30 mins and then back on and then if that has not produced desired effects then it means a lot more waiting, several days, for DLM to forgive you. Other kitizens especially Kitz herself will know how long you typically have to wait in the DLM waiting game.
If you do have any specific questions about the detailed stats, or the meaning and interpretation of the graphs, then do please ask and we will be glad to help.