I use this lnurlpay service where you can set the amount of sats

👉https://www.lnurlpay.com/marcelo@walletofsatoshi.com

And I also use nostr:npub1getal6ykt05fsz5nqu4uld09nfj3y3qxmv8crys4aeut53unfvlqr80nfm that allows me to create a static QR Code 👇