i don't know about ordinary ankle ROM.
how far they need to come forwards for you to be balanced depends on your femur length in relation to other things.
i have long femurs and my knees don't come in front of my ankles at all (which means i want to fall backwards a lot when squatting).
i can do a relaxed asian squat okay, though. a bit of a feat of balance, but not too bad.
i think you should probably be able to do a relaxed asian squat.
hold onto something in the first instance. a pole or doorway edge or something. then you can wiggle around a bit figuring out how different stance widths / degrees of turning the feet out feels comfortable for ya. the asian squat is more about your being comfortable down there than your recruiting things (e.g., it isn't about having a tight bottom position or maintaining your lumbar arch or even about your pushing your knees out hard).
once you have things feeling comfortable then you can worry about that other stuff.
the hindu squat lets my knees come forwards in front of the ankles. instead of requiring ankle dorsiflexion it seems to require balance / strength in the toes / arches of the feet. i don't plan on loading them, really. i will probably work on speed / power a bit one day. at the moment i'm finding the balance really tricky, though. have a lot of work to do on stretching my feet out. feels really good, though, like it is something that needs to be done.
i think it is connected to my ankle problems. hopefully these will help with that. no luck with improved dorsiflexion. did start a new job, though, which involved a lot of time on my feet. almost crippled for a while there. finally got some comfortable shoes and feet are feeling pretty adapted. so time to hit things a bit harder with them since they aren't all inflamed from that anymore.