The Miracles Haven't Stopped
Miracles are displays of God's almighty power through the accomplishment of something considered impossible by humans. A miracle could be a healing or saving someone from an accident that should've been unavoidable.
Miracles are used to show the glory of God and bring Him honor and praise. See Acts 10:37-38 "You know what has happened throughout the province of Judea, beginning in Galilee after the baptism that John preached --how God anointed Jesus of Nazareth with the Holy Spirit and power, and how he went around doing good and healing all who were under the power of the devil because God was with him." Be wary of those who do miracles and then claim the glory and praise for themselves instead of giving glory to God.
The New Testament is full of miracles performed by both Jesus and his disciples but modern-day Christians can have a hard time telling the last time they saw a miracle happen. Miracles didn't stop when the disciples died and we moved into the modern age. Let's start with two hard questions. When is the last time you saw a miracle? Second, When is the last time you prayed for a miracle? I don't mean a "let my favorite team win" miracle or a "get me the best parking spot" miracle, but an actual life-changing miracle?
Miracles serve the purpose of bringing glory and validation to the words of the Lord in the eyes of the lost. Miracles don't just happen because you want them to. You have to do the leg work before God moves his part. "But that evangelist always does miracles it must be so easy for him."
That Evangelist needs to spend time in prayer each day, fasts regularly, and spends time seeking and understanding God through His word. Then he goes out and speaks to the lost and has his heart broken time and again as he prays over hundreds of people. For every miracle prayed for only a few will actually happen.
That isn't meant to dishearten you but to encourage you. Everything that the evangelist does you can too. You can pray, you can read your bible, and you can fast. Miracles are not passive incidents they are active moments meant to show the people who witness them the true glory of God.
If you want to see miracles again then you need to leave your comfort zone and pray for people beyond closed doors. Pray for the man begging in front of the store, pray for the woman who is in a wheelchair, pray for the child that falls ill too young. Don't make promises you can't keep telling them "they will be healed right here, right now" but do pray that the Lord will heal them in His timing and sometimes you will get to witness the miracle first hand, other times it will come without you ever even knowing.