I like A, but maybe the label is just Bitcoin or Bitcoin on-chain?
Could you also explore a version where the inputs are before the generated QR?
Looking great brother
Another iteration. Which is better? nostr:npub1uapy44zhu5f0markfftt7m2z3gr2zwssq6h3lw8qlce0d5pjvhrs3q9pmv 
Discussion
I don't like just "Bitcoin" - it's all bitcoin! I thought about onchain but I feel this might be less understood by some... Need to test that. Thanks for feedback 🙏 
Yeah definitely hear you, it’s hard to decide names, I think you’ve nailed by labeling Bitcoin Address since it’s explicit.
Well, could also be BTC Address. Shorter. But looking great, placement looks great too since you want to add an amount the QR generation flows from top to bottom.
😍😍
Interesting! In my idea the qr code here is an lightning address, not the invoice. Those are shown on separate screen when generated. How that changes how you feel about this now? 
Is it possible to remove the Create Invoice button, so the qrcode dynamic change when we type the amount/description fields?
I doubt it but, nostr:npub1e5tfhk8m65teu25dfx8lcvwn4c8ypqjl72u2sh4rt8zy2kss0j5qct7mh9 ? :D