Can the Tribunal reject to entertain an appeal based on the monetary limits

Yes. The Tribunal has been conferred with discretion to refuse to admit an appeal where the tax or input tax credit involved or the difference in tax or input tax credit involved or the amount of fine, fee or penalty determined by such order, does not exceed ` 50,000/-

(ICAI FAQ PUBLICATIONS 06-09-2017 Appeals to the Appellate Tribunal: FAQ NO. 42)