Can I Update My 100amp Panel To A 150 Amp Panel Using The Same Awg2 Al-Triple Wire That's Coming Into My House From Meter? Or Will I Need To Update That Wire To A Larger Wire?

No, the feeder from the meter, and possibly the meter, plus the feeder conductors feeding the meter, all need to be changed to 150 amp rated.

Look into changing to 200 amp service, 150 amp is an odd size.