India played a massively inferior version of this England team in 2021 and still dropped a test
That "dropped" test was due to missing Jadeja and Shami and they have shown what they can do in this tour, especially in Indian conditions.
England took advantage of Sundar and Nadeem's bowling and made merry. The moment Axar came into the side in the next test, they couldn't buy a run.
Also in that vein, in the 2017 series against Aus, Aus lucked out not playing Shami.
Shami has the best average in Asia by any pacer (tied exactly at 20.28 by Imran). Waqar, Wasim, McGrath, Marshall, Steyn etc all average more.
Even in this series he is averaging 14.42 while Cummins, the no 1 bowler is averaging 39.66.
Shami has outbowled the likes of Anderson/Broad, the NZ trio, Rabada/Philander etc in home conditions.
And Jadeja is like an ATG spinner and an ATVG batsman in India. England lucked out massively in that 1st test.
India have lost 0 tests in Asia when all three of Shami, Ashwin and Jadeja have played.