Lead Magnets That Convert?

I'm building a consumer fintech platform - a space with a high trust barrier. We've been doing a ton of content to build trust and presence through short form video (TikTok/Insta), as well as a personal finance newsletter we run 3x/week (in URL). We also have several personal finance related calculators on our website.

All of these elements we've hoped would act as lead magnets, but success has been mixed.

We've grown to 3,000+ subscribers for the newsletter and have a decent open rate (~30%), but converting readers to users has been difficult. A couple dozen readers have converted.

To people out there building consumer platforms, what has worked really well for lead magnets these days? Anyone in consumer fintech particularly - your perspective would be much appreciated! Thanks!