Have you read Deuteronomy 6:8 (NET)
You should tie them as a reminder on your forearm
14 and fasten them as symbols
15 on your forehead.
tie what? fasten what?... You'll have to figure out the context.
This verse falls within the beginning of what the Jews call the Shema which is where the "Two greatest commandments" are derived. The Shema is a compilation of scripture from Deuteronomy 6:5-9, Deuteronomy 11:13-21 and Numbers 15:37-41and is prayed every day.
The Jews express the commandment of Deuteronomy 6:8 through the use of Tefillin.
When I think about the mark of the beast, I think of the opposite of what the Tefillin represent. As a result, a Christian can't take the "mark of the beast". For instance, can a Christian eat meat offered to an idol? According to Paul, he can as long as he gives thanks to God.
In the same way, and I'll entertain your idea of a micro-chip, but lets say a Christian gets a micro-chip through the vaccine (which I don't believe, but I'll entertain it). Does this in and of itself mean the Christian has somehow changed status from saved to damned? I don't think so.
In the same way, if you put on the Tefillim, would that make you a Jew, or would the mere act of wearing the Tefillim bind you closer to God?
God judges us from within, and what is within us is expressed by what we do. Outwardly we may appear to be paying homage to a false idol, but inwardly, God knows and hears our prayers of thanks.