I would be surprised if a bishop has banned the celebration of the Stations of the Cross during Easter. But the following may help in appreciating the priest’s position.
The 2001 Directory on Popular Piety and the Liturgy is at
vatican.va/roman_curia/congregations/ccdds/documents/rc_con_ccdds_doc_20020513_vers-direttorio_en.html .
The Stations of the Cross are called the “Via Crucis” in this document and it has in n. 133: “The Via Crucis is a particularly apt pious exercise for Lent.”
In n. 153, under the heading “Eastertide” it has:
“The Via Lucis
153. A pious exercise called the Via Lucis has developed and spread to many regions in recent years. Following the model of the Via Crucis, the faithful process while meditating on the various appearances of Jesus - from his Resurrection to his Ascension - in which he showed his glory to the disciples who awaited the coming of the Holy Spirit (cf. John 14, 26; 16, 13-15; Lk 24, 49), strengthened their faith, brought to completion his teaching on the Kingdom and more closely defined the sacramental and hierarchical structure of the Church. …”.
Regarding regulation, the document has:
“21. Manifestations of popular piety are subject to the jurisdiction of the local Ordinary. It is for him to regulate such manifestations, to encourage them as a means of assisting the faithful in living the Christian life, and to purify and evangelize them where necessary. He is also to ensure that they do not substitute for the Liturgy nor become part of the liturgical celebrations(23). The local ordinary also approves the prayers and formulae associated with acts of public piety and devotional practices(24). The dispositions given by a particular local Ordinary for the territory of his jurisdiction are for the particular Church entrusted to his pastoral care.”