Laravel on Heroku: Mailgun configuration setup but password reset emails don't get sent

No errors are reported either. The Heroku logs show only that the get and post requests are being made.

I set up the environment variables and verified the account and domain settings. I also set up an api route /send and successfully send email through it so it appears that the settings are all correct.

Let me know what snippets of files would make sense to show and I'll do it right away.

I've been toying around with Laravel for ~1 month so it's all still pretty new to me.