The Bible League Trust, a Protestant Organisation, states in regard to their own heading 'God Manifested' that :
“God was manifest in the flesh.” 1 Timothy 3:16 [TR/KJV]
This is obviously referring to the incarnation of God the Son. It is one of the strongest testimonies to the deity of our blessed Lord in the New Testament.
They thus make clear that God, as such, he who is Spirit, is manifested in Jesus Christ his Son. Of him, a voice from heaven has stated, once at his baptism, and once at his transfiguration 'This is my beloved Son' and also 'hear ye him', Matthew 3:17 ; Mark 1:11 ; Mark 9:7 ; 2 Peter 1:17.
Before the world began, eternal life was promised, Titus 1:2. And 'the life, the eternal' says John in his first epistle 1:1, 'which was with the Father' ... 'was manifested'.
Thus both God himself and eternal life, as such, are manifested in Jesus Christ, the Son of God.
The Gospel Coalition, a Protestant Organisation, says on the subject of 'God makes himself known' :
God makes himself known as Lord through divine revelation, which is given to all people through creation and human nature and to specific people through events, inspired human words recorded as Scripture, and Jesus Christ himself.
God communicates about himself to particular people in special revelation, which includes the events of nature and history, human words that are inspired by God and recorded for us in Scripture, and through the person of Jesus Christ, who is the ultimate image of God. In all of these different ways, God reveals himself as Lord, which is comprised of his control, presence, and authority over all things.
'Manifestation' and 'Revelation' are divine activities : I suggest a further question if information is required regarding the activities of believers in response to God's revelation of himself.
The phrase 'in their daily lives' (in connection with 'manifestation' and 'interaction') indicates, to me, a misunderstanding of what Protestantism understands by 'manifestation' and 'interaction'.
The Protestant gospel conveys Christ to the believer through the apostolic word. It is through preaching and teaching, not 'daily life'.
One's path through the days of this life will be governed by the gospel which one believes. It will not be a continual and repeated experience of that which is taught, doctrinally, through preaching.
That faith will be outworked in daily life. But the expectation of repeated personal 'manifestations' and 'interactions' is unrealistic.
Protestantism is not mysticism.
The lives of Abraham, Isaac and Jacob, and Saul/Paul and others, show plainly and clearly that visitations by the Lord are especial events in one's life and are not multiplied, day by day.