On April 8, the Texas Senate passed SB 1822. It says if the redistricting process is delayed, the 2022 primary will be later than normal. Depending on when the redistricting is done, the primary might be in April, or in May. Normally it is in March.
If the primary is delayed, that will make ballot access easier in 2022, because petitioning in Texas can’t start until after the primary is over. So if the primary is later, then the petitioning period is later and the deadline is later.