Yes, Yoho Mobile sells unlimited data eSIM plans that are valid only in Bangladesh. The Bangladesh‑only unlimited plans run from 1 day to 30 days. Prices start at $3.99 for a 1‑day plan and rise to about $122.79 for a 30‑day plan. Each plan lists a maximum speed of 5000kbps and notes that speeds may be throttled after heavy use, following a Fair Usage Policy.
If you want to be certain how much data will remain at normal speed, contact Yoho Mobile directly for details about their Fair Usage Policy and typical data limits before throttling. The plans are branded “Bangladesh Unlimited” for local coverage, but global unlimited options also cover Bangladesh if you need broader roaming.