You can install
python -m pip install aiida-tbmodels
python is the interpreter for which you installed AiiDA.
To run TBmodels calculations, you will also have to set up the
tbmodels CLI as an AiiDA code. After installing TBmodels, you can run
which tbmodels to find the full path of the executable. Make sure to put
unset PYTHONPATH into the prepend text of the code, since the
PYTHONPATH set by AiiDA might interfere with your TBmodels installation.