Another scenario that may be helpful ----
Strata Title is issued after the project is sufficiently complete that the buildings themselves can be surveyed and a survey/legal description can be made for each unit. In many cases a portion of the development is completed and occupied long before the Strata survey can be done. In such a case the occupant has possession, but not "title" since the "Strata" title is not yet on file, and therefore cannot be turned over. The buyer is protected by an agreement for sale that typically states that Strata will be completed as soon as feasible.
Until there is a Strata plan in place, there can be no "official" (registered) Homeowner's Association, and therefore no "official" HOA fees (because there is no HOA). This does not preclude the development team from charging a fair-share of grounds-operations costs to the occupants.
If you buy very early in the development, perhaps the developer takes on all costs for keeping up the grounds for a time due to the mess of construction, and the fact that it's hard to tell what is "residential upkeep" and what is mostly attributable to sales and construction.
Later as the project comes closer to completion, there may be significant portions of the grounds that are truly done - a pool and gardens perhaps. There may be a water-maker supplying units with potable water, a cable tv subscription or wi-fi .... etc --- it is not uncommon for a fair-share of costs to be assessed to the unit occupants for the services they are receiving. This is technically not a HOA fee, but it serves a similar purpose.
Until there is a strata title, there is only a property-tax bill on the land that sits under the project. It is common for the buyers of a condo unit to pay a fair-share of that tax bill, pro-rated from the date of possession/closing. After the issuance of a separate Strata title, the owner of record will then be responsible for only the taxes on their particular unit. In most cases the strata tax bill will be considerably higher than the one on land-only that preceded Strata.
It can be confusing to compare Belize Strata title with the US condo legislations. In fact, condo law varies a lot from state to state, and a Californian buying in New York may face a learning curve similar to a Texan buying in Belize.
Read the purchase agreement, read the CC & Rs - in Belize these documents tend to be written in language that a layman can easily understand. Most of the questions/answers you have about the condo you buy will be outlined and addressed in these documents.