No. A private sales deadline does not replace the government’s post-vetting gift instructions or set the immigration decision date.
Use the correct authority for each deadline
Decide any private transaction on its own understood terms. Do not send money on the claim that a development closing automatically secures visa availability, completes vetting or reserves permanent-residence approval. Ask, of every deadline put in front of you, who set it and what happens if it passes.
A promoter's subscription date is set by the promoter and expires into a commercial consequence: a place in an allocation, a price, an availability. The steps in the official process are set elsewhere, follow vetting, and are communicated through official instructions; nothing a private seller writes advances or delays them. Put the two sets of dates in separate columns and resist any document presenting them as a single schedule, because a combined timetable creates pressure belonging to only one of them.
Confirm the current official steps and their sequence against the official source before treating any date as fixed. Hypothetical example: an engineer is told that a subscription closing date governs when a programme payment must be made, and the two calendars are shown to have no relationship at all. Ask also what a missed private deadline actually costs, in money and in options, and obtain that answer in writing before it is used to hurry a decision.
A cost stated in a document can be weighed; a cost described only in conversation tends to grow each time the conversation is repeated.