Short answer. No. The rule says plainly that no extrajudicial settlement binds a person who did not take part in it or had no notice of it. Your siblings' deed can be registered and still have no effect on your share as an heir.
What the law says
no extrajudicial settlement shall be binding upon any person who has not participated therein or had no notice thereof
Rule 74, Section 1 — Extrajudicial settlement by agreement between heirs. Read the full provision →
Registration does not make it binding on you
It is easy to assume that once a deed is signed, notarised and accepted by the register of deeds, the division is settled. The rule says otherwise. Its closing clause withholds binding effect from any person who has not participated in the settlement or had no notice of it. Registration records what the signing heirs agreed among themselves; it does not supply consent that was never given. So the fact that new titles may already have been issued does not, by itself, convert a settlement made behind your back into one that governs your rights.
Two separate ways to fall outside it
The clause is written in the alternative — a person who has not participated therein or had no notice thereof. That matters, because the two are not the same complaint. One heir may have been left out entirely and never heard of the settlement at all. Another may have known it was happening but never signed. Either situation places a person outside the settlement's binding effect under the text of the rule. You do not have to show that you were deliberately concealed from; it is enough that you were not part of it.
Publication is a separate requirement
The same rule requires that the fact of the extrajudicial settlement be published in a newspaper of general circulation. It is worth being clear about what that does and does not do. Publication is a requirement imposed on the settling parties; the rule does not say that publishing it cures the absence of a left-out heir's participation. The non-binding clause sits in the same sentence as the publication requirement and is introduced by but, which reads as a limit on the effect of what precedes it rather than something publication satisfies.
What to do about it
Because the settlement does not bind you, the practical question becomes how to assert the share you were excluded from, and against whom — the siblings who signed, or a buyer who has since acquired the property. The rule also provides that the bond filed with the register of deeds answers for just claims, and it fixes a period after death within which creditors may come forward. Those timing elements can matter a great deal to what remedy is realistically open. Bring the deed, the titles and the dates to a lawyer promptly rather than waiting to see what your siblings do.