Burmese military junta is a coward. A military which is known for atrocity against defenceless civilian population have very low morale to fight a conventional war with worthy opponent. There is a reason, Burmese military is facing the world's longest running and largest number of insurgency in the world. They are in conflict for 72 years. Given the character of the Bamar military junta and a large percentage of people there, these insurgencies will continue easily for another 72 years or more.
In paper, Burmese army have twice the man power of Bangladesh( 400k vs 200k respectively). But much this 400k army of Burma is engaged in suppressing dozens of ethnic insurgency in Myanmar and thinly spread across Myanmar.
If you look at this map, you will understand, Myanmar does not have the luxury of concentrating large number of troops and weapons in Bangladesh border, at least not on a scale Bangladesh could. Myanmar is a country which is constantly fighting against itself.
Burmese common soldiers are very poorly paid. Burmese govt. defence budget(2.2 billion dollar) is not enough to properly maintain that a large number of personnel. Junta's main source of income, Yaba smuggling, Gemstone smuggling and gas looting provide a lot of money, but all of it pocketed by generals and senior military leadership, common soldiers do not see the face of this illicit money. Burmese soldier's pay is atrociously low, they often lack basic life saving equipments in the battlefield which is evident in their high casualties in fight against rebels. Many soldiers are forcefully recruited and poorly trained for an conventional war. They are the foot soldiers for fighting and dying against the ethnic rebels. Poorly paid, poorly trained, poorly gazetted and conscription based army means many of them may not highly motivated to serve the cause of Junta. This is very different from Bangladesh army, which is half the size of the Burmese in the number of personnel, but entirely voluntarily recruited, better trained and better paid and highly motivated, and most importantly, not fighting against it's own country.
For equipment part also, this discrepancy remain, much of their army equipment exist only in paper, how much of that are operational or can be field to fight a conventional war is in doubt. This is also true to large extent for their air force and naval equipment.
So, I am doubtful that Burmese junta will dare to go on a largescale offensive against Bangladesh. They may try to create some border nuisance like air space violation, taking advantage of their better Air Force. But I doubt they have any gut to fight Bangladesh on a conventional battle.
It is important that, we do not under-estimate our opponent. But it is also important that we do not give more credit to the opponent than they deserve. We need a right balance. Our intelligence(NSI, DGFI) need to be one of the best in the world.