HTTP2 not working on LAMP droplet with Ubuntu 20.04

I followed the following steps to configure my LAMP droplet:

1. Install LAMP with Ubuntu 20.04 - https://marketplace.digitalocean.com/apps/lamp
2. Create non-root user: https://www.digitalocean.com/community/tutorials/initial-server-setup-with-ubuntu-20-04
3. Create virtual host: https://www.digitalocean.com/community/tutorials/how-to-set-up-apache-virtual-hosts-on-ubuntu-18-04 4: Install LetsEncrypt: https://www.digitalocean.com/community/tutorials/how-to-secure-apache-with-let-s-encrypt-on-ubuntu-20-04
4. Enable http2: https://http2.pro/doc/Apache

Enabling http2 should be straight forward by enabling it with the following command: a2enmod http2

And adding this to the virtual host file: Protocols h2 http/1.1

When I test my website(https://in-het-engels.com/) for http2 support on https://tools.keycdn.com/http2-test I get the following error:

• HTTP/2 protocol is not supported.
• ALPN extension is not supported.

Any ideas what I could try next to get it to work?