Assuming you are referring the default openwrt non-ct ath10k firmware for the r7500v2, last time I checked, that has not been updated in more than five years. But it is a good idea to try it anyway as it may help in a bug report to the ct dev.
FWIW, I believe ddwrt is using a different and possibly newer non-ct ath10k firmware version than openwrt. I have not tried it, but it is possible to extract the ath10k firmware blob from the ddwrt image and attempt to use it with openwrt (either the ct or non ct driver). It may not work at all tho and updating would be a pain. Just using ddwrt is likely the better 
an easier option.
EDIT (apologies if its TMI) , the r7500v2 wifi is an "ath10k 9980" chipset which is different than the r7800. The last default openwrt ath10k 9980 "kavalo" firmware i checked has the version string "10.4.1.00030-1ww" Somewhere in the ddwrt forms there is a post indicating a new firmware for the r7500v2 is/was being used. I pulled the 20200910-r44340 image, extracted the firmware blob and its version string is "10.4-3.11.00023" I'm not sure if ddwrt is still using this version tho as I remember some r7500v2 wifi complaints in their forums after that. I have no idea where the ddwrt firmware came from and it does not look like it comes from any update from netgear (I checked when I wrote this post describing how to assemble a firmware blob from netgear updates). I haven't checked either netgear or ddwrt recently tho so perhaps they are using something different now.