How to check if my queries are being blocked by other queries?

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create view
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  public.lock_monitor as
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select
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  coalesce(
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    blockingl.relation::regclass::text,
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    blockingl.locktype
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  ) as locked_item,
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  now() - blockeda.query_start as waiting_duration,
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  blockeda.pid as blocked_pid,
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  blockeda.query as blocked_query,
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  blockedl.mode as blocked_mode,
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  blockinga.pid as blocking_pid,
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  blockinga.query as blocking_query,
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  blockingl.mode as blocking_mode
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from
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  pg_locks blockedl
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  join pg_stat_activity blockeda on blockedl.pid = blockeda.pid
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  join pg_locks blockingl on (
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    blockingl.transactionid = blockedl.transactionid
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    or blockingl.relation = blockedl.relation
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    and blockingl.locktype = blockedl.locktype
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  )
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  and blockedl.pid <> blockingl.pid
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  join pg_stat_activity blockinga on blockingl.pid = blockinga.pid
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  and blockinga.datid = blockeda.datid
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where
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  not blockedl.granted
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  and blockinga.datname = current_database();