This is a good example of how deceptive these types of info sources are. Arius did not propose that Yeshua was created. Paul was inspired to write that to the Colossians long before Arius was born.
Colossians 1:15 - Who is the image of the invisible God, the firstborn of every creature:
Of all of YHWH's created creatures, the Son was the firstborn from the dead unto eternal life.
It is interesting that Polycarp wrote in Greek, but we no longer have the chapter which contains this quote in Greek. Instead, we have it in Latin. The following trnslation is found
here;
² But may the God and Father of our Lord Jesus Christ, and Jesus Christ Himself, who is the Son of God, and our everlasting High Priest, build you up in faith and truth, and in all meekness, gentleness, patience, longsuffering, forbearance, and purity; and may He bestow on you a lot and portion among His saints, and on us with you, and on all who are under heaven, who shall believe in our Lord Jesus Christ, and in His Father, who “raised Him from the dead.
If the Greek had "theos" in it, it would be the same as Thomas' exclamation in John's gospel, "my Lord and my [theos]". Not a problem since "theos" is used of beings other the "God".