How to activate lorawan end device LGT92 US915

hello, I have a problem with my lgt92 US 915 end device. where the problem I have is that I can’t activate lgt92 on TTN. But I have registered it on TTN but it still looks inactive. I have checked repeatedly on my DevEui lgt92 section, the results are still the same. can you check my devEui maybe there is a problem there.
this is my devEui : a840418a3182f7d9
can you help me, please. thank you

https://developers.mydevices.com/cayenne/docs/lora/#lora-the-things-network-v3