Try the following:
# sudo apt -y install libwxgtk3.0-dev
# Ubuntu 20.04 LTS does not have this package for Erlang
# Need to install from source:
# https://www.wxwidgets.org/downloads/
# https://wiki.codelite.org/pmwiki.php/Main/WxWidgets31Binaries#toc2
sudo apt-add-repository 'deb https://repos.codelite.org/wx3.1.3/ubuntu/ eoan universe'
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 6856E1DB1AC82609
sudo apt update -y
sudo apt -y install libwxbase3.1-0-unofficial3 \
libwxbase3.1unofficial3-dev \
libwxgtk3.1-0-unofficial3 \
libwxgtk3.1unofficial3-dev \
wx3.1-headers \
wx-common