participe passé agree with direct object

Question

does participe passé agree with direct object when "on" is the subject of the passive sentence.for example  on l'a regardée (she was watched)(la is feminin article)ı wish your helps thanks

Accepted Answer

https://progress.lawlessfrench.com/revision/grammar/special-cases-when-the-past-participle-agrees-in-number-and-gender-when-used-with-avoir-in-le-passe-compose-conversational-past The example seems to be straight from this lesson, with simply a change in the subject. The past participle in this situation agrees with the direct object - which is la. (L'a is of course the elision of  «la a» which is why the grammar rule applies). As the agreement is with the direct object, the subject is not relevant in this case.

Answer

thank you Maarten