I think there technically might be, but it would involve making an account at different Masto instances to pull your content to each individual instance.

You’d also miss out on most others creations if you try to connect your Lemmy account to mastodon, Lemmy doesn’t support hashtags. That’s vital for Masto use IMO.

From Masto it’s quite different, you can easily follow users and there’s services that allow admins to sub to hashtags from unfederated instances so you’d get a whole different visibility. I convinced mine to sub to #cartography and #maps so I get any post tagged with them, even if our instances are unconnected.

Could be worth the time to make a Masto account just for this, it’s for the full month you know. 🤓 The cartographer community seems a lot bigger on mastodon as well, they even have special interest cartographers like mastodon.social/@ConspiracyOfCartographers.

I do wish they’d come to Lemmy though, this platform is much better for topic-focused posts and discussion. Mastodon is more like a social network with a lot of noise to signal.