Native mobile app
I know people want this :) Vote if you want to get updates on the development here. Long answer on why this may take a while to come to fruition: https://support.lunchmoney.app/faq#are-there-plans-for-a-mobile-app
time-based one time Password 2FA
In addition / instead of SMS-based 2FA, it would be great to use TOTP 2FA ( https://www.twilio.com/docs/glossary/totp ). TOTP would be harder to intercept than a SMS code.
tab between fields in Transactions review transactions navigate table like a spreadsheet create new transactions, recurring items, etc.
Toast / Notification Speed
The toast / Notification at the bottom left often contains a ton of information that I would like more time to read and interact with. If this could stay on the screen just a little longer it would be helpful
Roll-up transaction emails
Send new transaction imported email notifications once a week as a roll-up