No package for i386 architecture in Ubuntu 20.04

I need libtre-dev i386 for compiling a 32 bits only software named PixTudio (pixtudio.org) in Ubuntu 20.04 x64 but it is not available in Ubuntu Focal.

Every other i386 package I need is still in the Ubuntu repositories, but not this one, and, AFAIK, Ubuntu Focal libtre-dev packages for other architectures are the same that the ones used in Ubuntu Bionic.

Could it be possible to add libtre-dev i386 to current edition's repositories?

Thanks!

PS: I am solving it by downloading the packages and installing them. My software is compiling flawlessly :)

wget http://mirrors.kernel.org/ubuntu/pool/universe/t/tre/libtre5_0.8.0-6_i386.deb
wget http://mirrors.kernel.org/ubuntu/pool/universe/t/tre/libtre-dev_0.8.0-6_i386.deb
sudo dpkg -i libtre-dev*
sudo dpkg -i libtre5*