From when Indian Industrial Revolutions have been discussed before, I believe that the coal in India is not of a form or at a depth where it can be accessed through early modern mining techniques, although
@Flocculencio can probably provide more details.
More broadly, part of the problem with discussing alternative industrial revolutions is that we only really have the example of one successful Industrial Revolution to choose from, and
maaaybe one or two also-rans (Southern Song being mentioned a lot, for instance). This makes it hard to know what's
necessary for an Industrial Revolution in the British style, versus what just happened to be there, and whether there's
other paths to industrialisation which are unlike what was followed in OTL.
Given what we know of British conditions in the eighteenth and nineteenth centuries, Bengal was missing a lot of what was present. It has low wages, while Britain had high wages, which are often cited as encouraging mechanisation. Bengal did have a decent financial system afaik, but did not have anything like the scale of coal mining and exports which Britain relied on. As far as I know, it also didn't have an equivalent system of rewarding inventors (patent protection) which rewarded people for developing new inventions
while still allowing that knowledge to spread. Without some form of doing so - though there are alternative systems to patent protection - then the natural inclination is to keep inventions secret to profit from them, which makes it harder for others to build on them.
Of course, this is just describing factors which were present in Britain, it doesn't necessarily mean that they were essential to an industrial revolution. It also still leaves potential other paths to industrialisation, too. You can see aspects of that in OTL. For instance, the chemical side of the Industrial Revolution shifted to Germany in large part, and France managed a form of industrialisation without using much coal (with electricity substituting). Sweden also had a thriving iron production without using coal in a meaningful way, in their case because they could rely on very high quality iron ore and abundant forests so that they could use charcoal instead.
Perhaps Bengal could follow another path entirely. I wouldn't rule it out. But a Bengali industrial revolution probably wouldn't look much like the one we know.