Not normally.
Usually the talkaround channel is the repeater OUTPUT. That's what the mobile unit is monitoring anyway, instead of the repeater INPUT. However, some agencies use the repeater input as a secondary simplex channel. They just use a different CTCSS or DCS encoding so it will not key the repeater when they want to use it to talk directly to another mobile unit. It's not as common as using the repeater output frequency.
Usually the talkaround channel is the repeater OUTPUT. That's what the mobile unit is monitoring anyway, instead of the repeater INPUT. However, some agencies use the repeater input as a secondary simplex channel. They just use a different CTCSS or DCS encoding so it will not key the repeater when they want to use it to talk directly to another mobile unit. It's not as common as using the repeater output frequency.