The research of A. Bakhtawar is supported by the ARC grant DP180100201, of M. Hussain by the ARC grant DP200100994, of D. Kleinbock by the NSF grant DMS-1900560, and of B. Wang by NSFC (11831007). Part of this work was carried out during the workshop "Ergodic Theory, Diophantine approximation and related topics" sponsored by the MATRIX Research Institute.