Dynamis (Δύναμις) means...
... strength, ability, capatity and is "by far the most commonly used force-term" in classical Greek and thus also in the New Testament. (118 occurrences in the NT) "He can designate the (all) power of God, the miracle-working power of Jesus and the apostles," the healing and saving power of God
between Easter and the end of the world as well as the powers of heaven. Likewise "Dynamis in New Testament time could mean in a comprehensive sense all sorts of power or deeds or assets of a being or a thing".
All quotes and further information in: Susanne Luther: Dynamis. https://www.bibelwissenschaft.de/wibilex/das-bibellexikon/lexikon/sachwort/anzeigen/details/dynamis/ch/c41d49f1540e16701e4c05ac2e6bff93/#h3