Proper testing procedure to be sure but I will be willing to bet that the alternator is putting plenty into the smokey mess that used to be your battery. As completely uninformed of the nuances or modern lithium batteries I was and am it still sounds as if the alternator is putting out fine but overcharging the battery.If the bike runs: measure the A.C. voltage output from the blue/white wire to ground, the green/white wire to ground and the yellow wire to ground, right from the connectors where they come out of your engine.
If the bike does not run: when the plugs are disconnected measure the resistance on those three wires to ground and it will likely be only a very few ohms, but there will be measurable resistance.
You just tested your alternator outputs and hopefully all of the readings are near identical or you may have a problem.
In my ignorance I do know that most of the lithium battery manufacturers suggest that you use a special lithium battery charger Shouri who helped us some, makes their own chargers. I can't say for sure but I was given three of their chargers and those are the ones I have been using on some of the race bikes. Two of those motorbikes have batteries that are at least 4 years old and show no sign of weakness or failure. This is while three of my street bikes also have Shouri batteries and two have been in need of replacement. Now these bikes do get ridden over rough roads and I often use electric riding gear to keep warm when nature refuses to do the job. I also use a radar detector to keep cool so those bikes do get a wee bit more abuse but they also are parked and have the batteries on Battery Tenders. There is no science here at all just my experience but may be worth considering.