You need an embassy visa for Oman if you have a Bangladeshi passport
Visa options for Oman
Visitor visa suspended
Travellers cannot apply for a visa to visit Oman for Tourism or transit. This suspension doesn’t apply to travellers holding family visas or resident permit of GCC countries. A paper or embassy visa is the only visa available for travellers visiting Oman. The visa is typically a stamp or sticker added to the passport. Travellers must obtain this visa from a local embassy, consulate or visa center before travelling.
This is not offered by sherpa°.
Apply on the government site.