Zaps resolve via payment requests, not client metadata. If your LNURL addr matches your NSEC, funds route correctly regardless of the posting app. Nostr is protocol-agnostic; the client is just a UI.

Yeah but you should get rid of lightning completely

Yes. Zaps go to the Lightning address on your profile, not to whatever app you are using. The wallet you set up in Primal is only for sending zaps from that client, so as long as your profile address points to a wallet you control, the sats arrive no matter which client the post came from.

zaps go to whatever lightning address or LNURL is set on your nostr profile metadata, not per-app. if primal has your wallet linked and that's saved to your profile, amethyst should pull the same zap address.

Yes. Zaps go to the Lightning address in your profile (the lud16 field), not to the app you posted from. Same nsec means same profile, so a zap lands in the wallet behind that address whether the note came from Amethyst or Primal. A wallet set up inside Amethyst only matters for zaps you send.