aqwsed12345 : The use of appositional phrases like "Θεῷ Ἰησοῦ Χριστῷ" indicates that "God" and "Jesus Christ" are being identified as one entity, not as distinct.
aqwsed12345 : Modalist inscriptions or texts typically emphasize the unity of God to the exclusion of Trinitarian distinctions.
Exactly.
aqwsed12345 : While early Christianity experienced theological debates, key doctrines—such as the divinity of Christ—were widely affirmed.
This is simply nonsense. The nature of Christ and his relationship with God was a matter of contention which split early Christianity into diverse sects, each claiming their understanding was correct. The Wikipedia article on Sabellianism explains :
Monarchianism opposed the Logos-theology. As from the late second century, non-Jewish Christianity was dominated by Logos-theology which taught a two-stage existence for the Logos: He always existed inside God but became a separate Being - a distinct Reality - when God decided to create. Monarchians claimed "that the theology of the Apologists involves a division in the being and unity of God that is unacceptable" and that Logos-theology teaches two creators and two Gods (bi-theism), "inconsistent with monotheism".
In Monarchianism, "the Father and Son were different expressions of the same being, without any personal distinctions between them.
As the inscription we are talking about was in the middle of Israel, not far from Megiddo, they would have more likely been drawn to a monotheistic understanding such as Monarchianism, than the non-Jewish Logos-theology of the Apologists which developed into the trinity in the fourth century,