Thanks for the answer.
I have an emergency and urgent case, I am from Ukraine, we are at war.
I sent a support request. If anyone can help with the consideration of the application as soon as possible - help.
Who is the official owner, by whom and where the phone was purchased - I do not know. I do not have any evidence of official acquisition.
Essence -
My friends left the war for the west of Ukraine as refugees. On the way, they stopped at my place in Kyiv and forgot their phone. I periodically contacted them on this phone, their acquaintances, friends and relatives also contact me on it, and I tell them a new contact number. Recently, the phone started to fail, and I reflashed it. After that, I can not use it - activation lock. Asking if possible to remove the activation lock is my only way to keep in touch with friends, and the only way to give their contacts to those who try to reach them.
Thanks.