Install `libudunits2-dev` on Amazon Linux 2 - r

Question

I'm working in an Amazon-Linux-2 environment and would like to install the R-package "sf" which depends on the libudunits2-dev system library. I get the error message:
Configuration failed because libudunits2.so was not found. Try installing:
* deb: libudunits2-dev (Debian, Ubuntu, ...)
* rpm: udunits2-devel (Fedora, EPEL, ...)
* brew: udunits (OSX)
If udunits2 is already installed in a non-standard location, use:
--configure-args='--with-udunits2-lib=/usr/local/lib'
if the library was not found, and/or:
--configure-args='--with-udunits2-include=/usr/include/udunits2'
if the header was not found, replacing paths with appropriate values.
You can alternatively set UDUNITS2_INCLUDE and UDUNITS2_LIBS manually.
udunits2 cannot be installed with sudo yum install libudunits2-dev or libunits2-devel. I attempted installing and using epel but that also does not contain this library.
I installed udunits2 from source, and it can find the library but there is still an error. I am unsure how to build a dev version of this library
wget ftp://ftp.unidata.ucar.edu/pub/udunits/udunits-2.2.28.tar.gz &&\
tar -xvzf udunits-2.2.28.tar.gz; rm udunits-2.2.28.tar.gz &&\
cd udunits-2.2.28 &&\
./configure -prefix=/usr/local &&\
make install &&\
cd .. && rm -rf udunits-2.2.28
Current error message:
** testing if installed package can be loaded from temporary location
Error: package or namespace load failed for 'units' in dyn.load(file, DLLpath = DLLpath, ...):
unable to load shared object '/usr/lib64/R/library/00LOCK-units/00new/units/libs/units.so':
libudunits2.so.0: cannot open shared object file: No such file or directory
Error: loading failed
Execution halted
ERROR: loading failed
* removing '/usr/lib64/R/library/units'
ERROR: dependency 'units' is not available for package 'sf'
Edit ---------------------------
Thanks Knud Larsen for correcting the epel-package name. It looks like the installation is a bit involved but here is what I've figured out.
The sf package dependencies are libudunits2-dev libgdal-dev libgeos-dev libproj-dev. Which for amazon-linux-2 needs epel and to built from source. (note: epel gdal is version 1 and not compatible).
# Add epel repository
sudo amazon-linux-extras install epel
# install udunits2
yum install -y udunits2-devel
# install proj/gdal dependency
yum install -y gcc-c++ cpp sqlite-devel libtiff cmake3
# build/install proj
wget https://download.osgeo.org/proj/proj-6.1.1.tar.gz
tar -xvf proj-6.1.1.tar.gz
cd proj-6.1.1
./configure
sudo make
sudo make install
cd ..
rm -rf proj-6.1.1*
# build/install gdal
wget https://github.com/OSGeo/gdal/releases/download/v3.2.1/gdal-3.2.1.tar.gz
tar -xvf gdal-3.2.1.tar.gz
cd gdal-3.2.1
./configure --with-proj=/usr/local --with-python
sudo make
sudo make install
cd ..
rm -rf gdal-3.2.1*