Thanks for your support over the couple of years Coinomi had PKB included in its wallet.
I had expected PKB to be delisted sooner or later from Coinomi as George Kimionis told me back in June 2017 - Unless I contribute to the costs of servers & support they would be delisting low cap coins. One of the main reasons I ignored Coinomi's demand for approx 0.5BTC worth of PKB was due to the lack of a publicly view able source code these days from Coinomi. I understand their reasons for not publishing their source code and that is their decision to take but in the long term it is not the direction I would want to support with PKB.
As part of the ParkingChain development we will be releasing our own mobile wallets for use with a PKB that will be opensource and publicly view able.