In short, this would be frowned on because it can lead away from Christ.
Last weekend I attended two talks by a priest in honor of St Therese.
The priest spent a good amount of time explaining that we humans have a tendency to engage in idle thoughts & idle ideas that get in our way of focusing on God & why we are here.
Eastern spirituality is very dangerous because (at worst) it can lead to the occult or worshipping demons; or (at best) it will fill your head with idle thoughts that prevent you from keeping your thoughts where they should be.
Regardless of what truths Buddha taught and the good he did, his teachings do NOT lead someone to Jesus Christ. Emulating Buddha isn’t like emulating one of the Saints. Like the Blessed Mother, the Saints lead us to the Person of Jesus Christ.
Pagan spirituality, even from the best pagans like Buddha, always lead elsewhere.
I pray I’m making sense.
P.S. in addition to the above, a statue of Buddha can cause scandal by potentially giving another person the wrong idea and causing them to fall away from Christ due to misunderstanding your example.
God Bless