I can see where the confusion is, so let me help to clarify (full disclosure, I am a former employee of Aquila, one of the three predecessor companies that make up Evergy, and still hold stock in Evergy).
When KCP&L merged with Aquila (formerly Missouri Public Service or Utilicorp/United) they became Great Plains Energy. The Tait system was contracted to be built, with the intent of replacing KCP&L's Motorola Analog system, and Aquila's non-trunked repeater network. Likewise, Westar Energy had a separate 900MHz Motorola Analog system covering its operating territory and had started working with Motorola to build out a large Capacity Max system to replace their aging system. When Great Plains and Westar merged to form Evergy, the decision was to finish building out the respective systems, but at some point, consolidate into a single system. The Capacity Max system was chosen, and so they have started building additional sites to cover the old KCP&L (what is now called the "Metro" Division) and Aquila (now called the "Missouri West" Division) service areas.
Much of what you see in RRDB was collected by me over 4 trips in November/December of 2021-2022 (I've got another trip slated for September plus my November/December trips this year, and hope to get a day or two on the road each trip to survey more), and I can tell you that, especially the sites in the Metro area, were not online in 2021, but then showed up in 2022, and there are likely more sites online now in Missouri. I have a lot of detail in the
Wiki for the system, including a map showing all the licenses for the 900 MHz system (there's over 100 sites with licensees or pending applications, I probably should check with the FCC to see if any more have been granted).
The 900 MHz system will serve as packet data (data terminals in truck, although cellular LTE might be their primary means for faster bandwidth), location data ("LRRP"), as well as voice communications for the entire network. This includes some power plant operations, but also their crews in the field. The one exception to this is Wolf Creek Generating Station at Burlington, which has a separate 2-site Tier 3 system (not yet in RRDB, since I don't have enough data on it, but the information I had is in the
Wiki).
The Ericsson LTE system is only slated for remote meter reading as well as some "remote control" equipment control and monitoring but will not be carrying voice traffic. aka the "Smart Grid" network.
Based on your location you show in your messages, I presume that you are in Prairie Village. You likely should be picking up the Shawnee Site, as well as the Kansas City, MO site on the 900MHz system, if not also the Downtown Kansas City site (I didn't get it confirmed so it's not in RRDB but there is also a site in that area - see the
Wiki). Be sure to set your SDS100 to ID Search (in Sentinel it will be under the "Options" for the system), as there most likely is a lot more than the 2 talkgroups listed in RRDB being used.
I hope this helps, but don't hesitate to ask if you have any more questions.