He's actually only had 1 year. The first year of any President's administration is actually the fiscal plan of the last year of the previous administration. So, to say "How much did Biden increase the debt in his 2 years?" is a question for this time next year.
However, if you'd like some actual facts here's some reading for you: https://www.thebalancemoney.com/us-debt-by-president-by-dollar-and-percent-3306296
The TL/DR answer: Biden's budget for FY 2022 included a deficit of $1.84 trillion, increasing the national debt to $30.8 trillion.
The Trump years, for comparison:
FY 2021: $1.5 trillion
FY 2020: $4.2 trillion
FY 2019: $1.2 trillion
FY 2018: $1.3 trillion
Trump added $8.2 trillion to the debt, which is around a 33% increase.
