If the bible is or should be our one-and-only guide, then we can only draw conclusions based on it. So, if the apostles were solely given the power, which they were when looking at John's comments in Luke 3:16, and Jesus comments in Luke 24:49, how or why should we think that the power from on high would be given to others as you're inferring? That's a stretch and a dangerous one that unfortunately many make regarding a lot of scriptures they don't want to accept.
Don't confuse or conflate the power if prayer with the miraculous spiritual gifts noted in 1 Corinthians 12:8-10 which are in question. Prayer is NOT one of the gifts of the Spirit.
And having faith in God or Jesus is nor the miraculous type of faith noted in the aforementionedisting of spiritual gifts, du h as Stephen had. Can your faith move mountains? That's the type of faith that is of a miraculous nature.
God speaks to us through his word.
1Cor 12:7 But the manifestation of the Spirit is given to every man to profit withal. (Spiritual gifts)
1Cor 12:11 But all these worketh that one and the selfsame Spirit, dividing to every man severally as he will. (Spiritual gifts)
1Cor 12:31 But covet earnestly the best gifts: and yet shew I unto you a more excellent way. (Spiritual gifts)
These three verses are summed up as
all within the body of Christ that the Holy Spirit gives these Spiritual gifts to whom the Spirit of God can only give. There are diversity of gifts given, but the body of Christ is one in the Spirit as each are given different gifts that all work together as one body of Christ.
1Cor 12:4
Now there are diversities of gifts, but the same Spirit.
1Cor 12:5
And there are differences of administrations, but the same Lord.
1Cor 12:6
And there are diversities of operations, but it is the same God which worketh all in all.
1Cor 12:7 But the manifestation of the Spirit is given to every man to profit withal.
1Cor 12:8 For to one is given by the Spirit the word of wisdom; to another the word of knowledge by the same Spirit;
1Cor 12:9 To another faith by the same Spirit; to another the gifts of healing by the same Spirit;
1Cor 12:10 To another the working of miracles; to another prophecy; to another discerning of spirits; to another divers kinds of tongues; to another the interpretation of tongues:
1Cor 12:11
But all these worketh that one and the selfsame Spirit, dividing to every man severally as he will.
1Cor 12:27
Now ye are the body of Christ, and members in particular.
1Cor 12:28 And God hath set some in the church, first apostles, secondarily prophets, thirdly teachers, after that miracles, then gifts of healings, helps, governments, diversities of tongues.
1Cor 12:29 Are all apostles? are all prophets? are all teachers? are all workers of miracles?
1Cor 12:30 Have all the gifts of healing? do all speak with tongues? do all interpret?
1Cor 12:31
But covet earnestly the best gifts: and yet shew I unto you a more excellent way.
Paul was teaching the church (body of Christ) that each member is given a Spiritual gift and all these gifts work as one within the body of Christ. Either we believe what has already been written or we turn to that of what man has written in another gospel that speaks lies against the doctrines of Christ.