AFAIK, the authors doesn't create any clients for altcoins. You can just fork the source code for both the servers and the client and modify it to suit your coin.
The GitHub repo for the Dogecoin doesn't seem to be very active at all. There hasn't been any new releases for over a year now. You'd probably want to focus on that first before tackling the SPV wallet problem.
I think it could be doable. I am amazed that there is no popular Electrum Dogecoin yet.
I was reading, dogecoin is a fork of litecoin, which is a fork of bitcoin code. So it could be done with some changes, like Electrum Cash or something like that.
https://github.com/electrumalt/electrum-doge last post I found was 6 years ago, so it is certainly not a good option.