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In the $B^+\to D^+ D^-K^+$ decay, LHCb has reported the observation of theopen-charm exotic states $X_{0,1}^0\equiv X_{0,1}(2900)^0$ with four differentquark flavors~$(ud\bar s \bar c)$, where the subscripts (0,1) denote the spins.To confirm the discovery, we propose $\Lambda_b\to \Sigma_c^{0(++)}X_{0,1}^{\prime\,0(--)}$ in the final state interaction, where$X_{0,1}^{\prime\,0(--)}$ with $s u\bar d \bar c$ ($ds\bar u \bar c$) are thenew $X_{0,1}$-like exotic states. More specifically, $\Lambda_c^+D_s^-$ in$\Lambda_b\to \Lambda_c^+D_s^-$ are transformed as $\Sigma_c^{0(++)}X_{0,1}^{\prime\,0(--)}$, by exchanging $\pi^{+(-)}$. As the order of magnitudeestimates, we calculate ${\cal B}(\Lambda_b\to \Sigma_c^{0(++)}X_{0,1}^{\prime\,0(--)}) =(2.3\pm 0.6,4.3\pm 0.8^{+3.3}_{-2.5})\times 10^{-4}$.In addition, we estimate other $b$-baryon decays with the $X_{0,1}$-likestates, such as ${\cal B}(\Xi_{b}^{0(-)}\to\Xi_{c}^{0(+)}(2645)X_{0}^{\prime\,0(--)}, \Lambda_{b}\to\Xi_{c}^{\prime\,0}X_{0,1}^{0})\sim 10^{-5}$. While one needs $\Lambda_b\to\Sigma_c^{0(++)}M_c M$ to observe $X_{0,1}^{\prime\,0(--)}\to M_c M$ with $M_cM=D_s^-\pi^+$, $\bar D^0 \bar K^0$ $(D_s^-\pi^-$, $D^-K^-)$, ${\calB}(\Lambda_b\to \Sigma_c^{0(++)} X_{0,1}^{\prime\,0(--)},X_{0,1}^{\prime\,0(--)}\to M_c M)\sim 10^{-4}$ are accessible to the LHCbexperiment.

New $X_{0,1}(2900)$-like exotic states in $b$-baryon decays