Remote login for MySQL no longer working

I have a MySQL database on my droplet which I was remote logging into and updating from a Python script for the last couple of months. I used this tutorial to get everything working (https://linuxize.com/post/mysql-remote-access/). It worked well until a couple days ago when I had to get a new modem and my local IP address changed for my PC. This is the only thing that has changed, so I’m assuming the problem stems from having to change my modem.

I went through the above link again, checking the bind address for MySQL, creating a new user in MySQL specific to the new IP address, granting the proper privileges, and allowing access to port 3306 through UFW. I also tried removing MySQL completely and reinstalling and I still cannot login remotely to MySQL.

I keep getting this error: ERROR 2002 (HY000): Can’t connect to MySQL server on ‘server ip address’ (115).

I’ve looked into how to fix this, but the only solutions I have found have to do with setting the bind address in /etc/mysql/mysql.conf.d/mysqld.cnf to 0.0.0.0 and allowing access to port 3306 with UFW, both of which I have done. Any ideas or solutions?