Description of problem:
This rfe is solely for users who did not read the LVMDEVICES(8) man page which clearly states: 
"With no devices file, lvm will use any device on the system, and applies the filter to limit the full set of system devices.  With a devices file, the regex filter is  not  used,  and  the filter settings in lvm.conf or the command line are ignored."


LVMDEVICES(8)
With no devices file, lvm will use any device on the system, and applies the filter to limit the full set of system devices.  With a devices file, the regex filter is  not  used,  and  the filter settings in lvm.conf or the command line are ignored.  The vgimportdevices command is one exception which does apply the regex filter when looking for a VG to import.

# using a filter *without* a devices file
[root@hayes-01 ~]# pvcreate /dev/sd[bcd]1
  Physical volume "/dev/sdb1" successfully created.
  Physical volume "/dev/sdc1" successfully created.
  Physical volume "/dev/sdd1" successfully created.
[root@hayes-01 ~]# pvs
  PV         VG Fmt  Attr PSize  PFree 
  /dev/sdb1     lvm2 ---  <1.82t <1.82t
  /dev/sdc1     lvm2 ---  <1.82t <1.82t
  /dev/sdd1     lvm2 ---  <1.82t <1.82t
# filter
[root@hayes-01 ~]# pvs --config "devices {filter = [ \"r|/dev/sdb1|\" ]"}
  PV         VG Fmt  Attr PSize  PFree 
  /dev/sdc1     lvm2 ---  <1.82t <1.82t
  /dev/sdd1     lvm2 ---  <1.82t <1.82t


# using a filter *with* a devices file
[root@hayes-02 ~]# pvcreate /dev/sd[bcd]1
  Physical volume "/dev/sdb1" successfully created.
  Physical volume "/dev/sdc1" successfully created.
  Physical volume "/dev/sdd1" successfully created.
[root@hayes-02 ~]# pvs
  PV         VG Fmt  Attr PSize  PFree 
  /dev/sdb1     lvm2 ---  <1.82t <1.82t
  /dev/sdc1     lvm2 ---  <1.82t <1.82t
  /dev/sdd1     lvm2 ---  <1.82t <1.82t
# filter does nothing
[root@hayes-02 ~]# pvs --config "devices {filter = [ \"r|/dev/sdb1|\" ]"}
  PV         VG Fmt  Attr PSize  PFree 
  /dev/sdb1     lvm2 ---  <1.82t <1.82t
  /dev/sdc1     lvm2 ---  <1.82t <1.82t
  /dev/sdd1     lvm2 ---  <1.82t <1.82t

# add filter to lvm.conf
[root@hayes-02 ~]# grep filter /etc/lvm/lvm.conf 
        filter = [ "r|/dev/sdb1|" ]

# filter does nothing
[root@hayes-02 ~]# pvs
  PV         VG Fmt  Attr PSize  PFree 
  /dev/sdb1     lvm2 ---  <1.82t <1.82t
  /dev/sdc1     lvm2 ---  <1.82t <1.82t
  /dev/sdd1     lvm2 ---  <1.82t <1.82t


Version-Release number of selected component (if applicable):
lvm2-2.03.12-0.1.20210426git4dc5d4a.el8    BUILT: Mon Apr 26 08:23:33 CDT 2021
lvm2-libs-2.03.12-0.1.20210426git4dc5d4a.el8    BUILT: Mon Apr 26 08:23:33 CDT 2021