Tomlin told ESPN he would not talk about Bryant's status beyond this week.
"I said all I was going to say on the subject at the press conference," Tomlin said after coming off the practice field Friday. "What I did was consistent with what I told you guys on Tuesday."
Bryant has been unhappy with his playing time and doubled down on his request to be traded on a social media rant Sunday night after the Steelers beat the Cincinnati Bengals 29-14. His frustration came after just one catch for 3 yards on two targets in the game.
The Steelers have no plans to trade Bryant, but Tomlin said he will "rain down" judgment on Bryant's decision to air his feelings on social media.
It is not known if Bryant will be punished beyond missing the Lions game.
"He was out of bounds with some of his actions in terms of the things he said on social media," Tomlin said Tuesday.
Bryant spoke to reporters Wednesday after practice. He was asked directly about his future with the Steelers.
"I'm not going to speak on it," Bryant said. "I'm going to play football. I'm going to move on. What's done is done."
Bryant called out fellow wide receiver JuJu Smith-Schuster while responding to a critic on social media.
"JuJu is no where near better than me, fool all they need to do is give me what I want and y'all can have JuJu and who ever else," Bryant wrote in his comments Sunday night.
Bryant, who later deleted the comment, told reporters after Wednesday's practice he was frustrated and confirmed he was demoted to the scout team.
"I'm not going to hide how I feel," Bryant said. "What happened has happened. If I'm not traded I'm going to work my butt off here, and whatever happens happens. You're not going to hear me complaining no more. I'm just going to be quiet and let everything fall into place."
Bryant told ESPN he caught about 30 passes against the first-team defense as part of the scout team this week. He said he expected to travel with the team to Detroit and was prepared to watch the game from the sideline.
"Just working on my craft," Bryant said about his practice work.
In seven games this season, the 25-year-old Bryant has 18 catches for 234 yards and a touchdown while being targeted 36 times. For his career, Bryant has 94 catches for 1,548 yards and 15 TDs in 28 regular-season games.