Особенности работы с orm sql alchemy. Вызов .options у объекта Select не влияет на построение выражения

def fk_comment_profile():
    return [Comment.author_profile_id]
 
def fk_activity_author():
    return [Activity.author_profile_id]
 
 
class UserActivity(Base):
    __tablename__ = "user_activity"
    id = Column(String(100), primary_key=True, index=True)   
    published_at = Column(DateTime(timezone=True), nullable=False)
    identity = Column(String(100))
 
    __mapper_args__ = {
        "polymorphic_identity": "user_activity",
        "polymorphic_on": identity
    }
 
 
class AuthorRelate(UserActivity):
    __tablename__ = "author_relate"
    id = Column(String(100), ForeignKey("user_activity.id"), primary_key=True, index=True)
    author_id = Column(String, ForeignKey("profile.id"), nullable=False)
 
    __mapper_args__ = {
        "polymorphic_identity": "author_relate",
        "polymorphic_on": "identity"
    }
 
 
class Comment(AuthorRelate):
 
    __tablename__ = "comment"
 
    id = Column(String(100), ForeignKey("author_relate.id"), primary_key=True, index=True)
    video_id = Column(String(20))
    text_display = Column(String(10000), nullable=False)
    text_original = Column(String(10000))
    updated_at = Column(DateTime(timezone=True), nullable=False)
 
    profile = relationship("Profile", back_populates="comments", single_parent=True, foreign_keys=fk_comment_profile)
 
    __mapper_args__ = {
        "polymorphic_load": "selectin",
        "polymorphic_identity": "comment"
    }
 
 
class Activity(AuthorRelate):
 
    __tablename__ = "activity"
    __table_args__ = (
        CheckConstraint("(NOT(video_id IS NULL) AND type = 'upload') OR video_id IS NULL"),
    )
 
    id = Column(String(100), ForeignKey("author_relate.id"), primary_key=True, index=True)
    profile_id = Column(String, ForeignKey("profile.id"), nullable=False)
    video_id = Column(String(20))
    type = Column(Enum(ActivityTypes), nullable=False)
    deleted = Column(Boolean, nullable=False, default=False)
    
    profile = relationship("Profile", back_populates="related_activities", single_parent=True, foreign_keys=[profile_id])
    author = relationship("Profile", back_populates="authors_activities", single_parent=True, foreign_keys=fk_activity_author)
 
    __mapper_args__ = {
        "polymorphic_load": "selectin",
        "polymorphic_identity": "activity"
    }

from sqlalchemy import select
from sqlalchemy.orm import Session, selectin_polymorphic

base_columns = select(UserActivity, AuthorRelate).join(AuthorRelate)
subtables = selectin_polymorphic(UserActivity, [Activity, Comment]) # объект загрузки в *options - для специфических атрибутов

result_query = query.order_by(UserActivity.published_at).options(subtables)

query.order_by(UserActivity.published_at)