I installed an EPA certified wood stove in February. Why can't I claim the credit on my 2022 return?

See https://www.irs.gov/instructions/i5695#en_US_2022_publink100078772

 Is the "Stove" the actual heating unit for the dwelling.....i.e. is it effectively the furnace (or as the Hot water heater for the home)?

If it's just a stove for cooking, it's not likely qualified.

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And is it certified to be at least 75% efficient?

If so, then it is on one of the pages in the Home Energy Credits section, under Biomass Fuel Property.

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It is possible that you don't qualify for an energy credit in the current year because you don't have sufficient federal income tax to absorb the credit. You can only use an energy credit to reduce your income tax to zero, but not below that amount,  although an unused credit can be carried forward to future years. 

You can subtract line 19 from line 18 on your form 1040 to see the amount of tax available for non-refundable credits. You can see form 1040 while working in the online version of Turbo Tax by following these steps:

1. Click on Tax Tools in the left menu bar
2. Click on Tools
3. Look under Other Helpful links….
4. Choose View Tax Summary
5. Look in the left menu bar and choose Preview my 1040
6. Scroll down the page to see form 1040 and schedules 1 to 3

Check your Form 5695 to see if you have a carryover credit on Line 16. 

@MrG31