Yes, in this case it is permissible to immerse during the daytime of the eighth day (after what would have been the mikveh night), with no constraints on contact between you and your husband immediately afterwards.

If you have a daughter who indicates that she understands that you’re is going to the mikveh, you should explain before leaving that daytime immersion is only permissible now because it’s a time of crisis.

Since mikva’ot aren’t usually open during the day, putting this into practice depends on coordinating with a mikveh and its rabbinic supervisor.

As the pandemic continues, some mikva’ot may choose to create daytime hours for immersion on the eighth day, in order to accommodate women who can’t get there at night or to ensure that all the women of the community can be accommodated, while limiting the number of women who can be at the mikveh at once.