Want to remove divider between title and children when expanding tile.

Tried two ways but not able to make it transparent, Want divider after the children but not between title and children.

The ways, I have tried

    ListView.builder(
                itemCount: state.faq?.length,
                shrinkWrap: true,
                padding: EdgeInsets.all(0),
                physics: const NeverScrollableScrollPhysics(),
                itemBuilder: (context, index) {
                  final faq = state.faq![index];
                  return Theme(
                    data: Theme.of(context)
                        .copyWith(dividerColor: Colors.red),
                    child: Column(
                      children: [
                        ExpansionTile(
                          shape: Border(),
                          title: Text(
                            faq.question!,
                            style: CoreTextStyle.mRegular
                                .copyWith(color: CoreColor.black),
                          ),
                          trailing: state.faq![index].isExpanded
                              ? Assets.coreSvgs.downwardArrow.svg()
                              : Assets.coreSvgs.forwardArrow.svg(),
                          onExpansionChanged: (value) {
                            setState(() {
                              state.faq![index].isExpanded = value;
                            });
                          },
                          children: [
                            Padding(
                              padding: const EdgeInsets.symmetric(
                                  horizontal: 16, vertical: 8),
                              child: Text(
                                faq.answer!,
                                style: CoreTextStyle.mRegular
                                    .copyWith(color: CoreColor.neutral600),
                              ),
                            )
                          ],
                        ),
                        const Divider(
                          color: CoreColor.neutral200,
                          height: 0,
                        )
                      ],
                    ),
                  );
// 2nd ways
                      return ExpansionTile(
                        tilePadding: const EdgeInsets.symmetric(
                            vertical: 8, horizontal: 16),
                        shape: Border.all(color: Colors.transparent),
                        onExpansionChanged: (value) {
                          setState(() {
                            state.faq![index].isExpanded = value;
                          });
                        },
                        trailing: state.faq![index].isExpanded
                            ? Assets.coreSvgs.downwardArrow.svg()
                            : Assets.coreSvgs.forwardArrow.svg(),
                        title: Text(
                          faq.question!,
                          style: CoreTextStyle.mRegular
                              .copyWith(color: CoreColor.black),
                        ),
                        children: [
                          Padding(
                            padding: const EdgeInsets.symmetric(
                                horizontal: 16, vertical: 8),
                            child: Text(
                              faq.answer!,
                              style: CoreTextStyle.mRegular
                                  .copyWith(color: CoreColor.neutral600),
                            ),
                          )
                        ],
                      );
                    },
                  ),