Miracles are for the unbelievers, so there is physical evidence and witnesses to Eucharistic miracles either directly or indirectly. We believers are called to faith and to have the mind of Christ in the real presence in the Eucharist.
Hebrew 11:3 By faith we understand that the universe was
ordered by the word of God,* so that
what is visible came into being through the invisible.
I believe St. Paul sums it up very well for all ages here; In regards to the Real Presence, the Eucharist is revealed by the Holy Spirit and those who partake of the divine nature, who describe these mysteries of God with words revealed by the Holy Spirit described in spiritual terms.
1Cor.1:22
For Jews demand signs and Greeks look for wisdom,
23
but we proclaim Christ crucified, a stumbling block to Jews and foolishness to Gentiles,
25
For the foolishness of God is wiser than human wisdom, and the weakness of God is stronger than human strength.
27
Rather, God chose the foolish of the world to shame the wise, and God chose the weak of the world to shame the strong,
28
and God chose the lowly and despised of the world, those who count for nothing, to reduce to nothing those who are something,
29
so that no human being might boast* before God.
2Cor.2:9
But as it is written:
“What eye has not seen, and ear has not heard,
and what has not entered the human heart,
what God has prepared for those who love him,”
10
this God has revealed to us through the Spirit.
For the Spirit scrutinizes everything, even the depths of God.
11
Among human beings, who knows what pertains to a person except the spirit of the person that is within? Similarly, no one knows what pertains to God except the Spirit of God.
12
We have not received the spirit of the world but the Spirit that is from God, so that we may understand the things freely given us by God.
13
And *
we speak about them not with words taught by human wisdom, but with words taught by the Spirit, describing spiritual realities in spiritual terms. **
14
Now the natural person does not accept what pertains to the Spirit of God, for to him it is foolishness, and he cannot understand it, because it is judged spiritually. **
15
The spiritual person, however, can judge everything but is not subject to judgment by anyone.
16
For “who has known the mind of the Lord, so as to counsel him?” But we have the mind of Christ.
Peace be with you