Command to keep the sabbath not found in any NT letters to the church. 1 verse only has 'sabbath' for vast majority of translations.

[Scott Downey]

If a commandment to keep the sabbath was a worship requirement it would have had many more teaching references

And the only verse is about judgement coming from other people

Colossians 2:16 - Bible Gateway

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[Scott Downey]

EASY
Some people may tell you that it is wrong for you to eat or to drink certain things. Or they make rules about special festival days, about new moons, or about the Jewish days for rest. Do not agree with people like that.

EXB
So do not let anyone ·make rules for [or criticize; judge; or condemn] you about eating and drinking or about a religious ·feast [festival], a New Moon Festival [2 Kin. 4:23; Neh. 10:33], or a Sabbath day [C religious observances that false teachers pressured the Colossians to keep].

NIRV
So don’t let anyone judge you because of what you eat or drink. Don’t let anyone judge you about holy days. I’m talking about special feasts and New Moons and Sabbath days.